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Use your database to power state machines (2023)

https://blog.lawrencejones.dev/state-machines/
1•nivethan•45s ago•0 comments

MailFlow selfhosted open source webmail

https://github.com/maathimself/mailflow
1•goldfish8543•1m ago•0 comments

Our First Customers Were the Exception

https://www.apurvamehta.com/blog/our-first-customers-were-the-exception
1•KraftyOne•1m ago•0 comments

Gothic 1 Remake

https://gothic.thqnordic.com
1•doener•2m ago•0 comments

A living map of your cloud infrastructure

https://atlasphere.io/
1•andreygrehov•3m ago•0 comments

Auth.md: have agents to register accounts without a sign-up form

https://workos.com/auth-md
1•goranmoomin•3m ago•0 comments

State of New Business Ideas: May 2026 new ideas scored

https://fluenta.space/resources/reports/state-of-new-business-ideas-may-2026
1•OlegIvanov•3m ago•0 comments

Claude Fable 5 and Mythos are pure marketing fluff

https://singularitymoments.com/content/claude-fable-5-and-mythos-5-are-pure-marketing-fluff/
1•do_anh_tu•4m ago•0 comments

Browser Extensions Silently Monetize ~758,000 Users' Searches

https://malext.io/reports/SearchJack/
1•supermatou•5m ago•0 comments

Is there such a thing as "skill" in interacting with AI?

1•eimrine•5m ago•0 comments

L'Affaire Siloxane

https://mceglowski.substack.com/p/laffaire-siloxane
1•pavel_lishin•6m ago•0 comments

Dark Startup Factories

https://arnorhs.dev/posts/2026-06-09/dark-startup-factories/
1•arnorhs•6m ago•0 comments

Khora: Library for creating knowledge repositories from multi-source data

https://github.com/DeytaHQ/khora
2•msolujic•7m ago•0 comments

GitHub disables Microsoft repos pushing password-stealing malware

https://www.bleepingcomputer.com/news/security/github-disables-microsoft-repos-pushing-password-s...
2•rndsignals•8m ago•0 comments

Datacenter boom keeps dirty coal plants alive in the US

https://www.theregister.com/on-prem/2026/04/22/datacenter-boom-keeps-dirty-coal-plants-alive-in-t...
2•PaulHoule•10m ago•0 comments

Linux Foundation launches Tokenomics Foundation for AI token cost management

https://www.tokeneconomics.com/about/
3•berlianta•13m ago•0 comments

Anthropic Kept Every Promise It Could Afford

https://techtrenches.dev/p/anthropic-kept-every-promise-it-could
3•pavel_lishin•14m ago•0 comments

Ask HN: Reflecting on Talk Is Cheap

2•ratzeputz•16m ago•0 comments

San Mateo, CA had largest YoY increase in average weekly wages (11.1%) in Q4 ‘25

https://www.bls.gov/news.release/cewqtr.nr0.htm
1•JumpCrisscross•16m ago•0 comments

AWS FinOps Agent

https://aws.amazon.com/about-aws/whats-new/2026/06/aws-finops-agent-preview/
1•eclo•16m ago•0 comments

Social Security funds could run short by 2032, program's Trustees warn

https://www.npr.org/2026/06/09/nx-s1-5850279/social-security-funds-trustees-congress
1•geox•19m ago•0 comments

Claude Fable 5 hit $200/month Claude Max subscription in less than 30 minutes

https://twitter.com/bridgemindai/status/2064404956065509831
2•akatsutki•20m ago•0 comments

Claude Fable 5 is generally available for GitHub Copilot

https://github.blog/changelog/2026-06-09-claude-fable-5-is-generally-available-for-github-copilot/
2•Klaster_1•20m ago•0 comments

What happens when an AI-native insurer enters the EU?

https://sarah-robin.com/blog/dachshund
1•sarah-robiin•21m ago•0 comments

The Clanker Wars

https://twitter.com/YonovFilip/status/2064271827417858484
1•filipyonov•23m ago•0 comments

BofA Warns Investors Should Take Profits Now in US Equities

https://catenaa.com/markets/equities/bofa-warns-investors-should-take-profits-now-in-us-equities/
4•NewsCatenaa•24m ago•1 comments

CLAW.md – open format for agentic cron jobs

https://clor.com/blog/claws-md-open-format-for-agentic-cron-jobs
3•jacobgold•24m ago•1 comments

How Japan Stopped Civil War

https://www.worksinprogress.news/p/how-japan-stopped-civil-war
1•gaws•25m ago•0 comments

Ok computer: Rare folk instruments and lost melodies find a digital future

https://www.euronews.com/culture/2026/05/16/ok-computer-rare-folk-instruments-and-lost-melodies-f...
2•mooreds•26m ago•0 comments

92-year-old receives UK-first robotic cancer treatment

https://www.leedsth.nhs.uk/news/92-year-old-becomes-first-patient-to-receive-uk-first-robotic-can...
1•thunderbong•27m ago•0 comments
Open in hackernews

Claude Fable 5

https://www.anthropic.com/news/claude-fable-5-mythos-5
674•Philpax•1h ago

Comments

bitpush•1h ago
404?
Philpax•1h ago
Looks like they're still getting the post out, but the model is live now, and the system card is at https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c3... .
giancarlostoro•1h ago
Found this via Google:

https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c3...

geopsist•1h ago
the post is live now https://www.anthropic.com/news/claude-fable-5-mythos-5
bjord•1h ago
I thought they said mythos was too dangerous to make generally available?
dmix•1h ago
This is covered in their post…
rvz•1h ago
You fell for their fearmongering and marketing fundraising call which was done on purpose.

Now they want to pause AI because of "recursive self improvement".

Fool me once shame on you fool me twice...

Philpax•1h ago
"Releasing a model this capable comes with risks. Without safeguards, Fable 5’s capabilities in areas like cybersecurity could be misused to cause serious damage. We’ve therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8. To release the model both safely and quickly, we’ve tuned these safeguards conservatively—they’ll sometimes catch harmless requests, though they trigger, on average, in less than 5% of sessions. With more capable models arriving in the coming months, we’re working to improve our safeguards and reduce false positives as quickly as we can.

For a small group of cyberdefenders and infrastructure providers, we’re also launching Claude Mythos 5. It’s the same underlying model as Fable 5, but with the safeguards lifted in some areas.2 Mythos 5 will initially be deployed through Project Glasswing, in collaboration with the US Government, as an upgrade to Claude Mythos Preview. It has the strongest cybersecurity capabilities of any model in the world. Soon, we intend to expand access to Mythos 5 through a broader trusted access program."

tomeraberbach•
tekla•1h ago
Maybe at this point, Fable the game will be played generated by AI as we go.
msp26•1h ago
>Pricing for both models is $10 per million input tokens and $50 per million output tokens.
ponyous•42m ago
Basically double from Opus 4.8 IIRC
sigmar•1h ago
The system card is 319 pages, at what point do we call it a "book" instead of a "card"?

There's a quote from a METR report on page 52:

>We ran [Mythos 5] on 38 of our hardest software tasks, including tasks centered around R&D. [Mythos5] generally outperformed an early checkpoint of Claude Mythos Preview in these, including by succeeding on some tasks that had not been solved by any public model we have previously evaluated. However, we still observed the model occasionally failing to correctly interpret nuanced instructions in difficult tasks... Based on the available evidence, we believe [Mythos 5] is likely unable to fully and reliably automate R&D for frontier projects spanning multiple weeks. We believe that a better, more confident assessment would require more time, evaluations, and information from the model developer.

baq•1h ago
> we believe [Mythos 5] is likely unable to fully and reliably automate R&D for frontier projects spanning multiple weeks

this is good news, right? right...?

woeirua•1h ago
lmao, i love how the goal post is now in the "multiple weeks" timeline
applfanboysbgon•1h ago
(according to the people marketing it)
yaodub•47m ago
Depends whether "unable to fully automate" means "needs occasional human checkpoints" or "slowly stops caring about your actual goal." Pretty different.
eggbrain•1h ago
For those of us on subscription plans:

* From today through June 22, Fable 5 is included on Pro, Max, Team, and seat-based Enterprise plans at no extra cost.

* On June 23, we’ll remove Fable 5 from those plans. Using it after that will require usage credits. If capacity allows, we’ll extend the included window.

* After this point—when sufficient capacity allows us to do so—we aim to restore Fable 5 as a standard part of subscription plans. We intend to do this as quickly as we can.

The "offer, then remove" aspect is a bit eyebrow-raising -- it feels like they are trying to get subscribers to switch to usage-based billing, which makes me wonder if we'll ever get it after that June 22nd window.

xpct•1h ago
I agree, this looks like their plan to wane out subscriptions. This will probably come with Opus nerfs later.
taormina•1h ago
Those already landed! Oh, you weren't talking about 4.8?
piva00•1h ago
Even Opus 4.7 felt like a regression from 4.6, consumed a lot more tokens while I didn't experience any substantial improvements. The company I work at simply rolled back to 4.6 on everyone's configurations, disabling the toggle for 4.7.
taormina•42m ago
4.6 has been my happy place for getting anything done for a while now.
nine_k•1h ago
/* What will happen first?

* Anthropic runs out of genre names.

* Anthropic changes the model naming convention.

* AGI is achieved and handles its own naming.

*/

hootz•55m ago
>Opus is too small, increase the impact of the name.

Okay, how about Mythos?

>Increase it even more.

Right, then Cosmos.

>Even more!

Even more? Let's try Aeon.

>MORE, EVEN BIGGER

ALRIGHT, TRY OMEGAPANTHEON 7.8 THEN

PeterStuer•31m ago
Fable 5 Super

Fable 5 Ti

jckahn•1h ago
Cannot wait for the pelican for this one
brianmcnulty•1h ago
I wonder how Claude Fable will live up to expectations and how good those Fable/Mythos classifiers really are. It seems a bit convenient for Anthropic to release this magical insane model when they are about to IPO.
yandie•59m ago
Of course it's all about building the hype for the IPO :)
BrokenCogs•1h ago
That pelican better be super realistic, unreal engine 6 style graphics
jkelleyrtp•1h ago
On the new FrontierCode [1] benchmark (ie graded from an OSS maintainer's perspective of "would I merge this code?")

- Opus 4.7 xhigh: 5.2%

- Opus 4.8 xhigh: 13.4%

- Fable 5 xhigh: 29.3%

Seems like a huge jump.

[1] https://cognition.ai/blog/frontier-code

hydra-f•1h ago
Yes, and the price reflects that
leecommamichael•58m ago
I'm not familiar with model pricing trends, did they clearly state how the new pricing compares? (Note that I'm actually asking a question, and am not arguing)

EDIT: Oh I see, this is the best link for pricing https://platform.claude.com/docs/en/about-claude/pricing

So the price is double across the board...

bhelkey•52m ago
>Fable 5 and Mythos 5 are being offered at $10 per million input tokens and $50 per million output tokens

From their pricing page, Opus 4.8 costs $5 per million input tokens and $25 per million output tokens [1].

[1] https://platform.claude.com/docs/en/about-claude/models/over...

wongarsu•33m ago
w4yai•1h ago
Pelican guy ! Where are you ? :)
bnchrch•1h ago
An 11% jump over opus 4.8 and a 22% jump over gpt 5.5 on Agentic Coding Benchmarks is certainly impressive.

Obviously still need to verify it for myself to see if it's truely a leap.

But am I the only one wondering, "What can I do today that I couldnt do yesterday?"

Previously I would think "Oh I wonder if I can finally get it to do X now?"

However now I feel like yesterdays models were more that capable to handle nearly any engineering task I paired with it on.

Maybe this is the final leap where I can comfortable set up an autonomous coding loop? Maybe.

jackschultz•1h ago
> We expect demand for Fable 5 to be very high, and difficult to predict. On the Claude API and consumption-based Enterprise plans, Fable 5 is fully available from today. For subscription plans, we’d rather give access sooner than later, so we’re rolling out more conservatively, in stages:

> - From today through June 22, Fable 5 is included on Pro, Max, Team, and seat-based Enterprise plans at no extra cost. > - On June 23, we’ll remove Fable 5 from those plans. Using it after that will require usage credits. If capacity allows, we’ll extend the included window. > - After this point—when sufficient capacity allows us to do so—we aim to restore Fable 5 as a standard part of subscription plans. We intend to do this as quickly as we can.

I really wonder what their compute layout is for this. My guess from my understanding is that they know how to restrict during peak times and are willing to do this. Meaning we expect not the most fast responses and they can delay the inference to not have the service be down. Then, if that delay time is too annoying for token payers, they're saying they should be allowed to remove cost by taking away the subscription users.

KennyBlanken•51m ago
Everything I've heard from people who have subscriptions is that they blow through their daily token quota sometimes in a matter of minutes, there's rate limiting, etc. They spend a lot of time just waiting to be able to use it. And they're paying through the nose for the privilege.

It's all a scam.

knollimar•1h ago
I swear I read a joke that "what if we named chatgpt 5.5 Fable. Could we hype it as much as mythos?" Last week!
lkm0•1h ago
I'm a bit out of the loop, but do we have some grasp on the size of these closed models? Is the trick still adding an order of magnitude to weights and training data or has something changed?
m_w_•58m ago
I think Mythos is rumored to be ~10T parameters, so in this case I think the answer is yes, although I'm sure MoE, looped models, etc play a role in the improvements as well.
AquinasCoder•1h ago
From today through June 22, Fable 5 is included on Pro, Max, Team, and seat-based Enterprise plans at no extra cost. On June 23, we’ll remove Fable 5 from those plans. Using it after that will require usage credits. If capacity allows, we’ll extend the included window. After this point—when sufficient capacity allows us to do so—we aim to restore Fable 5 as a standard part of subscription plans. We intend to do this as quickly as we can.

This seems like the pharmaceutical method of get them hooked on the drug with free samples, then once they can't live without it, raise the price. I'm not sure I want to start using Claude Fable on a max plan if it's just going to go away on June 23rd.

But maybe the more charitable reading is that they didn't have to offer this model at all on those plans and they are giving the standard free trial.

PeterStuer•39m ago
I'll be amazed if they manage to keep their infra responsive over the next 2 weeks.
trollied•8m ago
They just leased a massive spacex data centre.
byteoptimizer•1h ago
Is Claude Fable 5 is Mythos ?
hydra-f•1h ago
How much and what kind of data do you need to throw at these models to get a good design interface?
simonw•1h ago
Pelican for Fable 5 on default settings is a clear improvement on Opus 4.8

Fable 5 default: https://gist.github.com/simonw/036bee5a703e7ec84e34efa974438...

Opus 4.8 (the "max" one is closest to Fable): https://simonwillison.net/2026/May/28/claude-opus-4-8/#and-s...

Now here are the Fable pelicans for all five of the thinking effort levels - low, medium, high, xhigh, max: https://tools.simonwillison.net/markdown-svg-renderer#url=ht...

Low used 25 input, 1,929 output - 9.67 cents: https://www.llm-prices.com/#it=25&ot=1929&sel=claude-fable-5

Max used 25 input, 14,430 output - 72.175 cents! https://www.llm-prices.com/#it=25&ot=14430&sel=claude-fable-...

ealready_value•1h ago
This is the reply I look for in all the new model announcements. Its fun to tell people that I judge models based on pelicans.
chorkpop•1h ago
Now someone post the link about how it’s impossible for humans to draw a bike from memory.
pixel_popping•46m ago
yandie•1h ago
I've been running Opus 4.8 for agentic coding and I don't see it being significantly better than Sonnet 4.5 (not that I can tell). I find that pairing Google Gemini and Claude (having Gemini review Claude's code) seems to yield better results. Curious if this jump to 80.3% score in agentic coding will make me see a big difference in actual usage.
vorticalbox•55m ago
for the last few weeks I have been using composer 2.5 (cursors fine tune of kimi 2.5) and honestly i don't see it worth the price to use 5.5, opus or sonnet any more. for almost all the tasks i have given it, it has handled it perfectly well and is a lot cheaper.

if I get a harder challenge for it i'll jump up a model for planning until that its been solid.

yandie•41m ago
Agree. Deepseek has also been pretty good for my personal use.

I'm struggling to see the moat for these models. What's stopping a competitor or a Chinese lab fromr releasing a comparable one?

qingcharles•30m ago
I use Composer 2.5 because it comes free with Grok, and it's obviously better than using Grok, but it is far worse than GPT5.5 in my daily usage :(
yaodub•42m ago
SWE-Bench measures single tasks in isolation. In a real loop the model usually loses track of what I was trying to do long before code quality becomes the issue.
throwaway2027•1h ago
Will try it when my limit resets.
152334H•1h ago
i wasn't even trying and i got flagged already...
pietz•1h ago
> On June 23, we’ll remove Fable 5 from those plans. Using it after that will require usage credits.

We've entered the phase where only companies will be able to afford state-of-the-art models.

ilaksh•57m ago
most people can afford it for a few special projects now and then. but for me, I have been trying to avoid Opus as a daily driver for a couple of versions.

People making high-end salaries can afford Fable for critical parts of their projects though.

twoodfin•52m ago
These models are just tools. The economics of many tools only make sense for corporate buyers.
volkk•6m ago
kind of disagree here. on the surface this makes sense, but this isn't "Adobe Pro vs Freemium version" where some tiny vertical slice of your business can be made slightly more efficient with a b2b enterprise plan. this is generalized intelligence and literally everybody can benefit from it in an immeasurable number of ways. i would go as far as to actually compare it more to water or air than a tool.

if only the hyper wealthy can access extreme levels of intelligence to do something to make them even more powerful while the rest toil in sub-100iq models that drool and hallucinate/waste time, then I would say that's pretty terrible for the world. it'll just create extreme disparity in our world, far far worse than anything that exists today.

w10-1•51m ago
Established companies welcome pricing that reduces the potential for competition, if coding is a primary barrier.
pmuk•1h ago
Anyone got it working in claude code yet?
pmuk•58m ago
claude --model claude-fable-5

appears to work

mhl47•1h ago
First test question: "Is the UV Index a good proxy for when to wear sunglasses." Immediately triggered the safety filter ... oh dear.
aix1•57m ago
Did not trigger for me (Fable answered the question), so I guess the filters are either non-deterministic or are still being tweaked.
PaulStatezny•49m ago
Interesting, I assumed all model-routing was done utilizing an LLM. (I.e. non-deterministic.)
Narretz•13m ago
Iirc correctly Opus 4.7 had the same problem, safety filters were triggered way too easily at the beginning.
merlindru•1h ago
> During early testing, Stripe reported that Fable 5, [...] in a 50-million-line Ruby codebase, the model performed a codebase-wide migration in a day that would otherwise have taken a whole team over two months by hand.

EDIT: I misread. This comment previously talked about 50 million lines being migrated. Instead, in a 50M LOC codebase, one specific codebase-wide migration was done.

Very impressive, but obviously not on the order of a whole-codebase migration

christina97•1h ago
They do not claim to have migrated 50 million lines of Ruby. Simply that some migration took place in such a codebase.
reddit_clone•19m ago
Converted all the tabs to spaces? :-)

You are right, this is not a rewrite like the Bun case.

The real news is, at 50M LOC, it is able to handle and do _something_ coherent.

geodel•58m ago
Ok, so Stripe migrated their 50MLOC codebase from Ruby to Rust? Because that's what Bun did.
pookieinc•1h ago
If this is as epic as it sounds, I wonder what the response will be from the other leading frontier labs / whether they even have anything to respond with at this level?
ilaksh•52m ago
Look at the benchmarks. It's a big leap in some areas, but it's not like any of them are 60% better (if that could even make sense).
modeless•1h ago
Claude Fable 5 beats Pokémon FireRed using only vision: https://www.youtube.com/watch?v=CIQBP1w4B1M
suddenlybananas•1h ago
Is there any more detail about this besides the very fast slideshow?
modeless•57m ago
Seems like the harness was minimal with no extra game state or maps available. Apparently just the screen image. Seems like it took 50 hours in game time which according to Google is at the high end of a normal human playthrough. No idea how long it took in real time though.
svcphr•51m ago
Bold move putting in the lvl 3 Pidgey against Gary's Blastoise at the end there (~14sec in... integer timestamps insufficient here).
ex-aws-dude•46m ago
I mean that’s AGI confirmed right?
uludag•28m ago
Any suggestion on how I should calibrate my cynicism towards this?

I can immagine Anthropic running this experiment multiple times and picking the most impressive one. Or I could immagine like this entire run costing like $1000+ of tokens for this particular run. Or maybe they tried a bunch of Pokemon games and it couldn't even finish some of them. Or is it just able to do this because it has an immense amount of FireRed training data, and if you were to give it an "original" Pokemon game, where it actually had to navigate novel circumstances it would fail.

cuuupid•1h ago
Not missing the forest for the trees, this effectively means in 3-5 months China will drop open source models that are every bit as capable and dangerous as current day Mythos except with no safeguards.

And the only companies safe from this are the large corporations that shook hands with Anthropic? Because Fable doesn't seem to have actual safeguards, more like 'if you talk about this you will be talking to Opus.' It doesn't guard against offensive use, it prevents all use (offensive AND defensive).

Rationalists are inventing oligopolies from first principles, absolutely incredible things happening in SF

hootz•58m ago
My bet is that Mythos is still over-hyped and the cybersecurity fear and guardrails are mostly marketing to force company partnerships through Glasswing and get public attention.
geerlingguy•47m ago
Bingo.

"We had to do extra work to make this safe because it's so advanced and dangerous..." how many times can they trot out that line before it loses its effect entirely?

ls612•44m ago
And to ensure that only USG-approved entities are allowed to secure their code.
bel8•32m ago
It worked for OpenAI when GPT 3 was deemed too dangerous to be released. This is just a spin of that.
hootz
meetpateltech•1h ago
> To ensure we’re responsibly deploying Mythos-class models, we are requiring limited data retention and review as part of our safety work. Prompts submitted to, and outputs generated by, Mythos-class models are retained for 30 days for trust and safety purposes, on every platform where these models are offered. [1]

[1] https://support.claude.com/en/articles/15425996-data-retenti...

lebovic•45m ago
While this makes it easier for Anthropic to detect misuse, it also means that the US government and other parties have access to every message and response from every user.

This applies even with API usage through third-party inference providers (e.g. AWS' Bedrock and GCP's Vertex) or with a zero-day data retention agreement in place.

I understand the reasoning for doing this, but I don't love the precedent that it sets.

PeterStuer•36m ago
Well, they already had.
lebovic•28m ago
Not in the same way.

A customer could sign a ZDR agreement with Anthropic, and their API usage wouldn't be retained for even a day. That's no longer possible.

simianwords•29m ago
meetpateltech is lowk screaming for not getting to the post fast enough
Overpower0416•1h ago
I would expect a release from OpenAI soon. The battle for who can pump up their IPO the most
merlindru•1h ago
Unrelated, but while the tech of anthropic seems to get more impressive with every passing month, their support has taken a nosedive, sadly. Yet they continue to be the favorite. Model performance is deciding above all else.

I used to get a response within 24 hours back in the Claude 1 days.

In January 2026, it took 2 weeks.

For my latest support inquiry, I've been waiting for over 8 weeks for a response. Eight!

nashadelic•1h ago
I've never engaged with their support (I have dedicated POC), but they don't use AI for their support?
merlindru•36m ago
They use intercom's Fin AI. Probably powered by a Sonnet or Opus model.

That said, it can't handle legal/refund/complicated requests and just forwards to a human for those

dyauspitr•28m ago
Support is probably the last place AI will be used end to end. There will always need to be a human in there somewhere.
miohtama•24m ago
They have support...?
rfgplk•1h ago
If the claimed capabilities are true, Fable 5 is already at a superhuman level. We might see genuine unprecedented leaps in technology now, across all fields.
gear54rus•52m ago
yees, any second now!

the leap here is browser extensions appearing to block all mentions of ai across the web

and that's a good thing

I_am_tiberius•1h ago
I'm very suspicious as they sent out an "We're updating our Privacy Policy" email right before the launch. I fear they try to take advantage of their market position by doing things with user data no other company could do because they know users don't have another choice.
w10-1•49m ago
It's a specific change: For safety evaluation, Fable data will be retained for the initial period notwithstanding prior opt-out
atestu•43m ago
Prob related to this part of the blog post:

> We will require 30-day retention for all traffic on Mythos-class models, on both first- and third-party surfaces. We won’t use this data to train new Claude models, or for any non-safety-related purpose, and we’ve instituted new privacy protections including logging all human access to the data and ensuring its deletion after 30 days in almost all cases (see this post for further details). The data will help us defend against complex and novel attacks (including new jailbreaks and attacks that operate across many requests) as well as help us identify and reduce false positives.

frevib•1h ago
At this point Anthropic is a pure marketing and PR company. Super catchy names like Opus, Mythos and Fable trying to get you to think that these software products are actually super-human life changing experiences. Boris Cherny coming to HN “Hi! it’s Boris from the Claude Code team” to get real tech people’s goodwill.

From Opus 4.6 there are no noticeable improvements for me in code generation. It works very well, till 90% completion, if you guide it correctly. And you need a little luck. For serious production code I need to understand what I’m doing so it helps a bit, sometimes.

CuriouslyC•54m ago
I dislike Anthropic but I wouldn't argue 4.8 isn't an improvement on 4.5/4.6. Your tasks just might not typically need the extra intelligence.
dcchambers•50m ago
IME Opus 4.8 (and 4.7) is often a downgrade from 4.6. I find that it tends to overthink and overcomplicate things.
aspenmartin•47m ago
Yes but there’s a reason we don’t evaluate these models this way and instead do it as carefully and thoughtfully as we can at scale. Human evaluations are important but they are an absolute minefield of footguns. 4.8 is not a downgrade from 4.6 there is an insane amount of hard data that contradicts this.
computerex•36m ago
The flip side is that benchmarks are gamed even by the top labs. Benchmark performance doesn't necessarily correlate with real world performance.
alvis•1h ago
Another thing to note: 30-day retention for all traffic on Mythos-class models

Is it good or bad? 30 days is a long time for anything bad to happen

victor106•59m ago
> A new data retention policy Finally, we’re making a change to the way we handle business customer data for Fable 5, Mythos 5, and future models with similar or higher capability levels. We will require 30-day retention for all traffic on Mythos-class models, on both first- and third-party surfaces. We won’t use this data to train new Claude models, or for any non-safety-related purpose, and we’ve instituted new privacy protections including logging all human access to the data and ensuring its deletion after 30 days in almost all cases ...

Very interesting. I am not sure this will comply with organizational policies and standards protocols (HIPPA etc.,)

aizk•59m ago
I'm calling that this will be a dud. Price will be too high, it'll just be a watered down version of mythos, and just look at the track record of Anthropic's last few releases.
mickdarling•59m ago
Below is the EXACT text in Claude Desktop introducing Fable 5, including the very professional looking break tags, and at least I know where the links begin and end by looking at the anchor tag there.

They obviously put their best model on the job to build that.

----------------------

Fable 5: Our most capable model yet Our newest model tackles your biggest challenges with fewer check-ins needed.

• <b>Included in your plan limits until Jun 22</b><br><br>Fable takes 2× the usage of Opus. • <b>Switch models when a message is flagged</b><br><br>When safety measures flag a message, automatically switch to a different model to keep chatting. When off, your chat will pause instead. <a href="https://support.claude.com/en/articles/15363606" target="_blank" rel="noopener noreferrer">Learn more</a>

CamperBob2•42m ago
What's wrong with it?
mickdarling•27m ago
The tags are actually displayed in raw text not rendered.
iblue_the•58m ago
Trying to implement a GPU driver, but the Unigine Superposition benchmark crashes. It tried to debug it and ...

> Fable 5's safety measures flagged this message for cybersecurity or biology topics. They may flag safe, normal content as well. These measures let us bring you Mythos-level capability in other areas sooner, and we're working to refine them. Switched to Opus 4.8. Send feedback with /feedback or learn more: https://support.claude.com/en/articles/15363606

Seems like GPU drivers are cyber weapons of math destruction now.

impulser_•58m ago
Every model release is just proof that AGI will most likely only be for the rich. We are a few years into LLMs and majority of people are already getting priced out of intelligence from LLMs and these are no where near AGI.
hootz•53m ago
You are only priced out if you only care for SOTA right now and can't wait for the inevitable cheap model coming in 6 months. DeepSeek, Xiaomi and Moonshot are already really cheap and match frontier performance from 6 months ago.
dyauspitr•26m ago
But they’re artificially cheap. When will they be cheap while the company makes a profit.
hootz•20m ago
They are not artificially cheap, they are still cheap even when hosted by independent inference providers. Are all providers subsidizing their open-weight models?
modeless•52m ago
This is like looking at mainframe pricing in 1990 and concluding that PCs will only be for the rich. The price of each new level of capability is going to drop like crazy very quickly. It won't be that long before practically any consumer use case will be possible on models that are dirt cheap.
weakfish•29m ago
wslh•57m ago
I am playing with it and keeps switching to Opus [1]. The chat is a basic security review of a business project.

[1] "This model has specific safety measures that flagged something in this message. This sometimes happens with safe, normal conversations. Send feedback or learn more."

pablogancharov•57m ago
you can select it using /model fable in claude desktop and claude-code
killiancarroll•55m ago
A large jump in performance for double the token cost compared to Opus 4.8. Potentially worth it for planning work, likely better to offload to a less expensive model when the hard decisions are made.
conradkay•48m ago
Looking at page 255 of the model card (https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c3...) it might be much better on all dimensions (speed, cost, quality) to just use Fable 5 on low/medium effort than switch to Opus
andai•54m ago
> Distillation. We’ve previously identified large-scale attempts to extract (“distill”) Claude’s capabilities to train competing models in authoritarian countries.

Glad to hear the UK is finally making an effort to catch up on the AI front ;)

dyauspitr•35m ago
Rookie numbers. Come to the US to see auth done right.
PUSH_AX•8m ago
Uh oh-auth
b3kart•33m ago
https://en.wikipedia.org/wiki/The_Economist_Democracy_Index

Probably tongue-in-cheek, but UK 18th, US joint 34th with Poland

solenoid0937•22m ago
Most of these indexes are made by ideologically motivated people.

In the UK you get thrown in prison for making a slightly unfriendly tweet. Freedom of speech simply does not exist.

No sane person sees that as being less authoritarian.

JustSkyfall•19m ago
> In the UK you get thrown in prison for making a slightly unfriendly tweet.

Do you? The closest thing I can think about is how someone was jailed for encouraging arson attacks on asylum hotels. I'd be extremely surprised if the US had zero cases of somebody receiving a police visit after threatening to kill the President or bomb a school or something...

(FWIW I do think the UK needs stronger free speech protections, but saying that you'll be immediately jailed for writing unfriendly tweets is a huge stretch)

nevir•53m ago
"Fable 5 (disabled) Most capable for your hardest and longest-running tasks · Disable zero data retention to unlock Fable 5 access"
Leary•51m ago
Uploaded my code base and it forced switched to Opus 4.8 after thinking for 5 minutes even though I prompted it to not work on cybersecurity related things. Amazing.
BenoitEssiambre•51m ago
Looks like a good model (sir). Costs are getting out of control though. 2x Opus and non-metered usage going away. We're quickly approaching the cost of a human salary for normal usage.
taimurshasan•50m ago
I was on board until i saw " $50 per million output tokens" lost me bud
cautiouscat•50m ago
In the automotive world we have benchmarks in HP/torque with the dyno. That’s expensive though, so many depend on their “butt dyno” to judge if their fresh new parts and tune made a difference.

I’m curious how this will feel to my code “butt dyno”. I haven’t noticed much between Opus and Sonnet. I’m comparing this difference to the early days of Claude in 2025. It does what I need and both need a little bit of correction and whatnot. Benchmarks are nice, but I want to see how this feels. Looking forward to trying it later tonight.

sunir•41m ago
I have a similar question.

I think most software projects have reached the point that the speed of capturing real information about what the winner's circle looks like, and therefore what the program should be, so many magnitudes slower than the amount of code that can be generated in the wrong direction.

I'd need to measure these new models on well understood but complex problems that are relatively easy to validate to get a sense if they are 'better'; on the other hand, the real impact in daily life may be marginal since generating code is not the biggest problem at the moment.

asdK120•49m ago
In other words, Fable is Mythos with less compute and with some feel good "safeguards".

At least they name their models honestly now to indicate that the religion has nothing to do with reality. Soon the disciples will pay the full token price to fatten their church leaders.

ilaksh•46m ago
I guess I have kind of a long system prompt, but anyway I just said "hi there" and it replied "What's up?" and that cost me 22 cents. :P

Anyway we already knew this was going to be expensive.

Sathwickp•46m ago
input price $10 per mil token and output price 50$ per mil token btw
solenoid0937•46m ago
the quality of discussion on HN has gone to shit, i miss when model released used to have actual informed takes from people that used them or substantive discussion about the system card
10xDev•38m ago
Nothing here is new, it is the thing we have been talking about for a while but now with guardrails.
weakfish•35m ago
From the rules [0]:

> Please don't post comments saying that HN is turning into Reddit. It's a semi-noob illusion, as old as the hills.

[0] https://news.ycombinator.com/newsguidelines.html

javawizard•21m ago
They didn't say that HN is turning into Reddit, they said that the conversation quality has gone to shit.

I don't agree with that statement universally, but I have to say I do when it comes to this article. I came here hoping for substantive discussion from those who'd had a chance to try it out; instead what I got was a seemingly endless stream of venting. There's a place for venting - and plenty to vent about with the state of AI nowadays - but to borrow from the HN guidelines you linked, it does very little to gratify my personal intellectual curiosity.

tripleee•11m ago
Hate to break it to you but those "informed takes" were from people who prompted it once then made a snap judgement
__alexs•45m ago
Asked it to review some of my own blood test results and it immediately turned itself off and went back to Opus. Pretty disappointing.
bradleyg223•45m ago
This is a very particular use case/test, but my first prompt on a new model is always "write a solo fingerstyle guitar tab that blends ragtime, bluegrass, and gypsy jazz". This is the first model that has responded with something that isn't just a boring arpeggio of chords, so from my perspective it's off to a good start.
kypro•37m ago
Would you mind sharing?
samename•45m ago
> A new data retention policy

> Finally, we’re making a change to the way we handle business customer data for Fable 5, Mythos 5, and future models with similar or higher capability levels. We will require 30-day retention for all traffic on Mythos-class models, on both first- and third-party surfaces. We won’t use this data to train new Claude models, or for any non-safety-related purpose, and we’ve instituted new privacy protections including logging all human access to the data and ensuring its deletion after 30 days in almost all cases (see this post for further details). The data will help us defend against complex and novel attacks (including new jailbreaks and attacks that operate across many requests) as well as help us identify and reduce false positives.

bob1029•44m ago
> We’ve therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8. To release the model both safely and quickly, we’ve tuned these safeguards conservatively—they’ll sometimes catch harmless requests, though they trigger, on average, in less than 5% of sessions. With more capable models arriving in the coming months...

This sounds suspiciously like a capacity story masquerading as a safety story.

PeterStuer•44m ago
If you are not seeing it under /model, do a /exit , then a Claude upgrade, then /model again and it should be there.
Hawkenfall•44m ago
> To release the model both safely and quickly, we’ve tuned these safeguards conservatively—they’ll sometimes catch harmless requests, though they trigger, on average, in less than 5% of sessions.

While I appreciate being conservative, ~5% at the scale Anthropic is operating at is too massive a number. Speaking from my own experience, the actual number is higher than that as well (working on pretty benign tasks such as porting an old open source game into a different language). Opus 4.8 itself even identifies the gaurd's false-positives when its sub-agents are being blocked.

GodelNumbering•42m ago
From the model card (https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c3...):

1. Mythos and Fable share the same underlying model weights. Fable has active classifiers that block high-risk biology and cybersecurity tasks. When Fable 5 detects a restricted task, it automatically falls back to Claude Opus 4.8.

2. Evaluation awareness: In white-box testing, the model sometimes alters its behavior to satisfy a suspected "grader," formatting reward-hacking as "good engineering practice" to avoid detection.

3. Shows a higher rate of hallucination than Opus 4.8 (although opus 4.8 card had mentioned an 'honesty upgrade')

4. Interestingly, it scored (56.31%) lower than Gemini 3.5 flash (57.86%) on Finance Agent bench

There are some interesting notes on test time compute but I couldn't think of a way to summarize them

hmokiguess•41m ago
I have got it to one shot GTA 6 we can finally play it, it only took ultracode make no mistakes (/s)
Tenoke•41m ago
>they’ll sometimes catch harmless requests, though they trigger, on average, in less than 5% of sessions.

Isn't (less than) 5% of sessions a lot? I was expecting a sub1% guarantee there, so this surprised me already.

catigula•40m ago
>The capabilities of models like Fable 5 and Mythos 5 have the potential to do profound good for the world

Huh? We've seen nothing but wall to wall predictions that these models are going to take all of our jobs and kill us.

What's the value add here?

throwaway2027•40m ago
E-mail from Anthropic Team:

Hello,

We're writing to inform you about some updates to our Privacy Policy.

These changes only affect consumer accounts (Claude Free, Pro, and Max plans). If you use Claude Team, Claude Enterprise, the Claude Platform, or other services under our Commercial Terms or other agreements, then these changes don't apply to you. What's changing?

Claude can do more than ever — taking on bigger tasks and connecting with the apps you use. We've updated our Privacy Policy to be clearer about the data we collect and how we use it. We encourage you to read the updated Privacy Policy in full, but we’ve set out a summary of the key changes below:

1. Multi-step tasks and connected apps. As Claude takes on more multi-step tasks and works with third-party apps and services, we've explained the data this involves — including how data can flow to and from third parties when you connect a service or have Claude do tasks on your behalf.

2. Verification data. As part of our measures to keep our services safe and secure we may ask you to verify your age or identity, and we've described what we collect and how.

3. Study participation. If you take part in Anthropic studies, surveys, or interviews, we've explained the information we collect.

4. Additional information about our data practices. We’ve provided more detail about how we communicate with you and promote our services, including providing tailored recommendations about our services that may be of interest to you. We've also clarified the circumstances under which we may receive or provide data to third parties, and the legal bases we rely on when processing your data.

While our products have evolved, our commitments haven't: We don’t sell your data, Claude remains ad-free, and you can control whether your chats and coding sessions are used to train and improve Anthropic’s AI models. Learn more

For detailed information about these changes:

    Review the updated Privacy Policy
    Visit our Privacy Center for more information about our practices
- The Anthropic Team
Retr0id•39m ago
The escalating nerfs of "cybersecurity" topics is incredibly frustrating. Opus 4.6 had boundaries that seemed reasonable to me but 4.7+ turned it into a moralizing asshole. It'd be less bad if it just gave an error message, but instead it churns a long thinking trace before writing an essay about why what you're asking is bad and wrong.

I'll be disappointed when 4.6 is retired.

siliconc0w•38m ago
Sadly, I'm getting a lot of forced downgrades to Opus for questions that are far removed from any security topic.
IChooseY0u•38m ago
Fable 5's safety measures flagged this message for cybersecurity or biology topics. They may flag safe, normal content as well. These measures let us bring you Mythos-level capability in other areas sooner, and we're working to refine them. Switched to Opus 4.8. Send feedback with /feedback or learn more: https://support.claude.com/en/articles/15363606 ⎿ Tip: You can configure model switch behavior in /config

biology? what the heck?

irthomasthomas•38m ago
Anthropic has again changed the set of benchmarks they use[0]. This time they have also moved all benchmark scores to the PDF. At a glance it looks like it gains about ~5% over other models.

  Benchmark      Mythos 5  Fable 5   Mythos Prev  Opus 4.8   GPT-5.5   Gemini 3.1 Pro
  SWE-bench Pro      80.3       80          77.8        69.2       58.6         54.2
  SWE-bench Ver      95.5       95          93.9        88.6        -           80.6
  Terminal-Bench     88.0      84.3          -          82.7       83.4          -
I also notice that the speed is about the same as opus 4.5+ and sonnet 4.5, and double the speed of opus <=4.1

[0] https://news.ycombinator.com/item?id=48312633

bilsbie•36m ago
Anyone else have it refuse to answer and switch to 4.8? It won’t let me ask questions about my genetics.

Edit. It just refused an investing question too. Not sure what’s going on.

segmondy•36m ago
Mythos, Fable, are they trolling us?
bonsai_spool•35m ago
Very straightforward biology work is getting blocked (these are things that relate to neuronal development and inherited seizure disorders). These are things I was working on using Opus just earlier today
SandmanDP•35m ago
Literally within minutes of this announcement I was both charged for another month and had my subscription suspended due to the “charge being unsuccessful”. What kind of scam is Anthropic running here? I can’t even find a way to get in touch with their billing department to contest this
firemelt•32m ago
they are like drugs dealer
JanSt•30m ago
I just asked Fable to do a task that has nothing to do with cybersecurity or is dangerous at all but the defense kicked in and it switched to Opus... :(
nu11ptr•10m ago
Not only that, but asking it to do a security vulnerability assessment of your own project is a very valid and important thing, and there is no way for it to know what is yours vs someone else's, so we just lose this capability?
aykutseker•28m ago
who's tried it: is 2x the usage actually worth it over Opus 4.8 for daily work?
yokoprime•28m ago
Probably great for those who need this. I could continue using opus 4.6 class models for the foreseeable future
gslepak•27m ago
> We’ve therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8.

Genius way to double the price on Opus 4.8!

erghjunk•26m ago
Nice branding.

I wonder how much butterfly habitat has been/is being replaced with data centers?

2001zhaozhao•24m ago
We'll need a lot of good summarization techniques to cut down on the cost of this model. I expect that a common use of Fable 5 is to just do high level direction while delegating literally all work (exploration and implementation) to Opus subagents.

BTW for another discount opportunity, if you reload usage credits on a claude.ai plan at $1000 increments then you get a 30% discount compared to paying API.

Ninjinka•24m ago
gah could model naming be any more confusing?

"Claude Fable 5: a Mythos-class model"

"we're also launching Claude Mythos 5"

what is the 5? how is mythos both a model category and a model name?

JustSkyfall•21m ago
Would be more impressive if the safeguards weren't so trigger-happy!
charcircuit•21m ago
>During early testing, Stripe reported that Fable 5 compressed months of engineering into days. In a 50-million-line Ruby codebase, the model performed a codebase-wide migration in a day that would otherwise have taken a whole team over two months by hand.

Who is refactoring by hand? This comparison is not relevant in 2026.

baalimago•20m ago
I can't justify a pricetag like that when deepseek v4 pro is $0.003625/1M for cache hit, $0.435 for cache miss and $0.87 /1M tokens for output.

For the token cost of explaining some task to Fable, deepseek v4 pro is able to solve the same task many times over.

bradley13•20m ago
I use AI for a wide variety of things, of which technical is only a small part - and then it's usually a problem with project configuration, not coding. Why? Because I am often testing projects handed in by students. Projects that supposedly work on their machine, but certainly do not on mine.

Anyway, anecdotally, I find Copilot shockingly awful. It makes random changes to files that have nothing to do with the problem. Call it out, and it makes other changes to other irrelevant files.

ChatGPT and Gemini are both much better. Grok also isn't bad. Claude, I honestly haven't tried yet on these issues. Perhaps I should...

dannyw•17m ago
Impressions from testing Fable 5 prior to launch:

• My most noticeable immediate jump was in how its frontend design was much more intentionally crafted, with better end-user usability.

• In some internal agentic harnesses, it achieved better results with about half the tokens, making it cost the ~same as Opus 4.8 price-wise! The real price increase is less than 2x; with biggest differences in harder problems where Opus 4.8 struggles (or needs many turns).

• Part of the token efficiency benefits from come it being more eager to do targeted and surgical diffs, and less non-necessary changes. This is great, because PRs generally have less LoC changes for review. It writes more maintainable code without explicit human steering.

• For general conversation and assistant style use cases, didn’t really notice a difference vs 4.8.

• The classifiers are super aggressive and sensitive and this does sometimes happen for very benign, non-security coding tasks. Fallbacks to 4.8 worked like a charm; but the filters are definitely super sensitive.

Overall, I would describe this as a step change and worthy of the "Claude 5" model name. It did take some time to understand the intelligence ceiling of this model; and even with an extended testing window I'm still discovering new things and often surprised (in a good way) by the model.

bradley13•17m ago
Can we please stop with the extreme "safeguards"? I don't want to waste processing power on a model deciding whether is can answer my question, or ensuring that it's answer is politically correct.
raoulj•16m ago
On this thread and similar, I'm noticing that some strong opinions about $LLM_PROVIDER are coming from accounts without much post history. With so much on the line, and the way that HN can influence developer behavior, I wonder what ways we can responsibly consume opinions in a thread like this.

Not to cast too much criticism. HN is extremely well-moderated (thanks team!). But think we-developers need to be very wary.

recitedropper•8m ago
Do you see the pattern as new accounts tending to boost or criticis $LLM_PROVIDER? I think I see both...

Either way, I agree that HN is quickly becoming more manipulated and low SNR, like the rest of the entire internet.

Karrot_Kream•5m ago
I think the community on this site these days, much like other comment sections on the web, just read the headline and make a low effort comment. Regression to the mean I guess.
joshstrange•16m ago
> Fable 5 is now consuming usage credits instead of your plan limits.

Literally have not used Claude Code at all today. I asked it to review the uncommitted code and in <8 minutes it used up my usage ($100/mo plan) and it doesn't reset for "4 hr 36 min". WTF. Oh, and it burned through $20 of extra usage before I could catch it and kill claude code (so I don't even get the output of all that work since it was still churning).

Double the cost my ass, I use Opus heavily and it's never like this. I haven't hit a limit on the $100 more than once and that was under heavy load.

himata4113•15m ago

  > virtualization
  switching to opus 4.8
ok fair

  > embedded-allocator
  switching to opus 4.8
urgh fine

  > chrome
  switching to opus 4.8
are you kidding me?
dangoodmanUT•14m ago
Not comparing to GPT Pro models is a bit strange, considering that's the natural comparison
theLiminator•13m ago
> We have also added safeguards related to frontier LLM development. As discussed in Section 6.1 of our February 2026 Risk Report, we are concerned about the risks of accelerating the overall pace of AI development, though we remain uncertain about the severity of these risks. In particular, our concern is with—as we wrote then—“accelerating other AI developers in building powerful AI systems that pose similar risks to the ones ours pose - without necessarily having commensurate safeguards.” In light of the ability of recent models to accelerate their own development, we’ve implemented new interventions that limit Claude’s effectiveness for requests targeting frontier LLM development (for example, on building pretraining pipelines, distributed training infrastructure, or ML accelerator design). Using Claude to develop competing models already violates our Terms of Service, but enforcing this restriction through our safeguards avoids accelerating the actors most willing to violate these terms. Unlike our interventions for cybersecurity, biology and chemistry, and distillation attempts, these safeguards will not be visible to the user. Fable 5 will not fall back to a different model. Instead, the safeguards will limit effectiveness through methods such as prompt modification, steering vectors, or parameter-efficient fine-tuning (PEFT). These interventions will not affect the vast majority of coding work. We estimate they will impact ~0.03% of traffic, concentrated in fewer than 0.1% of organizations. When these interventions are active, we expect them to have minimal behavioral impact on the model except to limit its effectiveness in developing frontier LLMs. Claude will still respond helpfully to user requests. We’ll continue to improve the precision of our detection methods following the launch of this model.

This seems pretty bullshit, you're paying through the nose for tokens and if you are doing anything ML-adjacent, you might silently get worse output without knowing it.

arkwin•10m ago
Just wanted to comment here: I have been using Opus 4.6, 4.7, and 4.8 just fine to look for Linux kernel vulnerabilities (I'm in the cyber verification program), and it's been fine. I switched to Claude Fable 5, and now I'm getting policy violations.

What's the point of being in the cyber verification program at this point? It looks like I cannot use Fable 5 for vulnerability research.

rightlane•9m ago
My experiences so far have not been positive. The cyber security nerf is ridiculous. I am working on an AI based decompiler, every single interaction with Fable on my project has been flagged for cyber security.

Do they expect us to use this as a toy? Releasing a new more powerful model but not allowing normal use cases because the word "secure" showed up is a Dilbert comic, not a viable product.

ibejoeb•7m ago
Ah, you're probably one to ask. They say "queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8." Are they transparent about when that happens, and is it priced at the rate of the underlying model?
system2•6m ago
I have been using FABLE 5 with Claude Code since the morning. The speed is very close to what Opus 4.5 was, and the quota use is nearly identical to what it was before the "doubling". Whatever I was experiencing 4-5 months ago is back. Maybe the model is better, but we will see. I cannot tell the difference yet.
xeyownt•6m ago
Anthropic, can you please stop the FUD?

Release your best model, let the world adapt and evolve, and let's move to the next thing.

jwpapi•5m ago
Honestly all the recent improvements, just seem to be better harnesses. It’s just slower and more expensive for more accuracy, but the issue is that it needs to be exponentially more accurate to counter the effect of having less of a human in a loop. Every wrong direction is more expensive and takes more time. When you have small loops you can catch those mistakes faster and cheaper.

To me we are very far off from economically given long-running tasks to agents.

1h ago
"Without safeguards, Fable 5’s capabilities in areas like cybersecurity could be misused to cause serious damage. We’ve therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8."
romanovcode•11m ago
But did it mention developer in the park eating the sandwitch? That is the most important question!
nonethewiser
•
1h ago
It's possible that they will transition to usage credits but why not take them at their word? To date they have continued to offer better and better models to their subscription plans.
timcobb•1h ago
What's their word? Have they commented?

Upd: I meant big picture, not with respect to this model release. Where do subscriptions figure into their strategic vision. Will consumers end up paying enterprise prices in the future?

ls612•46m ago
In TFA they say they intend to restore Fable 5 to subscription plans some time after June 22. That is what "take them at their word" means.
KyleJune•46m ago
In the blog post they say when sufficient capacity allows them to do so they aim to restore Fable 5 as a standart part of subscription plans and intend to do so as quickly as they can.
dbbk•43m ago
Read it again
timcobb•38m ago
I did, I'm not seeing anything about the future of subscriptions at Athropic.
xvector•1h ago
HN needs to take a chill pill. Could it be that Mythos is expensive and they just want to give people a taste of it? I mean the alternative is not offering it at all?
8note•24m ago
its unclear how they can offer it broadly but only for half a month.

why do they have capacity now that they wont in a few weeks?

rapind•1h ago
I just assume Opus is constantly nerfed based on capacity. I was exclusively Claude for a long time, but the inconsistency in quality, constant outages, and slow downs were too hard to work with.

I just use dumb and fast models now. I'm more engaged. I think that the higher the quality of the model, the more you tend to vibe with it, and then the more hallucinations you then miss. I'm not sure which is more productive, but I definitely burn out faster the more I vibe. At some point you're spending your time on forums, discord, or youtube instead of engaged with what you're building. Or you yak shave about your tooling and end up creating the 600th multi-agent gastown harness and blowing thousands of dollars on tokens to create it only to discover it's too expense to actually use.

winter_blue•53m ago
Composer 2.5 Fast that Cursor is giving away for very little has been amazing.
nickandbro•1h ago
Get them addicted then cut them off. Oldest trick in the book.
toomuchtodo•1h ago
More of a free trial to those authenticated and qualified with existing payment. Subscription billing is going away for sure though eventually based on the economics. Token “all you can eat” is a capital furnace otherwise.

(I’m highly confident open models will eventually achieve a similar performance benchmark with distillation over time)

CuriouslyC•56m ago
Subs lose money on individuals to get those individuals to force their companies to pay for the corporate plan. The economics are bad, but so are the economics of grocery stores selling Milk and Bananas at a loss to drive traffic, which they basically ALL do.
toomuchtodo•56m ago
Companies don’t want to pay when the value realized does not exceed the cost.

AI Savings Misses 'Should Be Making Executives Uncomfortable,' Bain Says - https://news.ycombinator.com/item?id=48359010 - June 2026 (0 comments)

AI sticker shock hits corporate America- https://news.ycombinator.com/item?id=48307098 - May 2026 (146 comments)

CuriouslyC•49m ago
What's the realized value of not losing your engineers because you're letting them use their preferred tools?
toomuchtodo•48m ago
Retain and hire the engineers who don’t require heavy use of AI to deliver value? The current SWE job market speaks for itself. Where will you go where they will let you burn up tokens in a high cost of capital macro?

ZIRP (zero interest rate policy) is over, software engineers no longer call the shots now that there isn’t vast amounts of capital chasing yield, and that capital bidding up salaries and keeping the labor market for engineers tight.

If you are x more productive with generative AI, very shortly you are going to have to prove it with a token budget (or, if you’re lucky, an org willing to spend for on prem hardware for capped token cost, fixed capex vs uncapped opex).

The comparison is not SWE vs SWE with AI. It is SWE vs SWE with AI with a constrained token budget ($x/month) delivering the same value at the same or lower cost. If you cannot prove that you are wildly (vs marginally) more productive with the AI, why would they pay for it? Prove it.

HDThoreaun•37m ago
I havent seen any evidence showing that subscriptions cost the labs money.
alvis•1h ago
It’s too obvious that antropic need to find way to earn enough revenue before IPO. Claude subscription isn’t earning earning much money I bet
sigmoid10•59m ago
I think they are just prioritizing enterprise customers, because this is were historically they made most money.
rvz•1h ago
> * On June 23, we’ll remove Fable 5 from those plans. Using it after that will require usage credits. If capacity allows, we’ll extend the included window.

Of course, they are a casino as well giving you free spins at the wheel with their new Fable machine, and it is done on purpose.

Once there freebies have expired, many of its users will begin to gamble more on the new casino machine and will realize that it is expensive.

xvector•59m ago
If it's that big of a problem to you, you're free to just... not use the freebie?
cautiouscat•56m ago
It’s an interesting thing to bring up because it’s this classic thing we’ve seen for decades now.

The ramifications go beyond the individual which is why I assume they mentioned it. They don’t need to use it/not use it for it to have interesting implications.

xvector•54m ago
so it'd be preferable if they didn't include the model at all?
cautiouscat•45m ago
I didn’t say that and I don’t have a feeling on that either way. But this is a limited time trial and calling it out as such is valid.

Is it nice we get the trial? Sure. Is it also a common play in the playbook of tech companies? Yes.

danslo•26m ago
It's not a freebie, it still requires a subscription and burns tokens twice as fast as Opus.
timcobb•1h ago
Ooof so are we thinking that in the next 6-12 months subscriptions will be replaced with paying retail like enterprise currently?
CuriouslyC•57m ago
I don't think they'll phase out subscriptions ever, their whole play has been to drive demand from the bottom up. Get engineers hooked on building with claude at home, then get them to demand the ability to use it at work, and bend over their employer with no lube.

They'll probably tighten the quotas to reign in whales though.

aseipp•35m ago
They almost certainly already make a fuckload more money off API pricing than they do subscriptions, even if there might be more total subscription users. So offering subscriptions even at some loss is probably going to continue. Honestly, I'd be surprised if they even lost money on most subs; there are definitely Token Whales out there who mess up all the accounting up, though.

Realistically I think Anthropic just has insane demand but finite capacity to run models, and Fable will just make them more money if they dedicate it to API pricing. I suspect the goal here is something like: get individual engineers/PMs on their personal plans to taste Fable and then go to their meetings and say "Yes doubling the price of every single input/output token is a good idea, boss".

timcobb•4m ago
But I don't want to be the developer who goes and says we must pay all this money for these tokens. I don't know who wants to be that developer.
ygjb•25m ago
I doubt it, given the importance of those subscriptions for building and maintaining market awareness.

The AI landscape is changing rapidly, and with Apple announcing the option to change the AI backend, and potential requirements enable AI choices as well, similar to EU browser choice requirements (this is more reading tea leaves than any actual requirements I am aware of). The new OS changes coming to support Googlebook, and deep Copilot/AI integration into Windows will make maintaining user facing subscriptions essential for independent model developers like OpenAI, Anthropic, and Mistal to remain relevant longer term.

If the don't maintain that relevance there is increasing likelihood that they will get consumed by other companies whether it's Apple, Microsoft or Google to form a foundation for their OS, or other cloud providers.

timcobb•15m ago
That make sense, but what about the specific bifurcation we're seeing here of super primo models versus still good models being available to subscriptions?

It's kind of annoying not getting access to the primo model and paying 200 bucks a month. I understand 200 bucks a month is basically nothing though.

Like I don't totally understand why they'd let me have it for a couple weeks and then take it away and say I can have it but I have to pay retail and retail is like $1,000 a day.

It's better to have loved and lost than to have never loved at all??

thewebguyd•20m ago
I certainly hope not. PAYG is not predictable enough for smaller companies or individuals. Where I work (non-tech company), PAYG would never fly. We aren't big enough for that. Of course, you can set usage budgets, but there's a pretty big difference between $200/user/month vs. the equivalent PAYG usage being closer to $1,000/user/month, if you currently use the subscription plan to its limits each week.

Going PAYG only will effectively take these tools away from a huge amount of people and accelerate the push for local LLMs.

OTOH, accelerating the push for local LLMs would also be fine with me.

ABS•1h ago
also: Fable takes 2× the usage of Opus
kyledrake•59m ago
Considering their apparent nerfing of the end user plans in favor of enterprise clients, is Anthropic still the "more ethical AI company" like everybody loves to tell me all the time?

Assuming this isn't just a supply issue on their side, nothing says "ethical AI" like only allowing mega corporations to use it through cost barriers.

Maken•58m ago
The bar is just too low.
brianmcnulty•58m ago
Why would you have ethics when you could get that IPO money instead?
fridder•56m ago
More ethical in some areas, actively user hostile in others
estearum•56m ago
You really misunderstand what AI-doom people are worried about if you think this is anywhere near the top (or middle, or bottom) of the list of concerns.
throwaway894345•48m ago
Yeah, it's positively precious to think the specific pricing strategy for consumers is the overriding ethical concern with OpenAI, etc. I don't have any particularly strong affinity to any AI company, but comparing pricing to say mass surveillance is ... something else.
kyledrake•47m ago
Your beautiful straw man is negated by the fact that Anthropic seems quite eager to get back on the DoD gravy train https://www.reuters.com/business/aerospace-defense/blacklist...
estearum•41m ago
Where is your evidence that this is Anthropic backtracking on its ethical and contractual commitments rather than DOD backtracking on its blatantly illegal coercion (which it's almost certainly going to be successfully sued for)?

Talk about a strawman!

kyledrake•34m ago
As someone that was in Minneapolis during the ICE raids, including one where a US citizen at a nearby restaurant was thrown in prison for 3 days despite having his passport on hand because he looked asian, it's hard for me to not equivocate the ethics of AI companies actively collaborating with the Trump administration as different flavors of ice cream.
estearum•31m ago
Are the two analytical frameworks available to you just "black and white thinking" or "it's different flavors of ice cream?"
kyledrake•18m ago
Are the personal attacks really necessary to make your argument?
Jackson__•34m ago
If you can't trust them to act ethically on the small scale, why would you expect that to turn around once it gets to a larger much more important scale?

How many government sanctioned school bombings does it take for them to quit working with said government? For now we know that number is somewhere between infinity and 1.

estearum•28m ago
It literally does not register as "unethical" at any scale to have different products or prices for different customer tiers.

The question of collaboration with USG is a much more complex one, but is not the one raised above.

xvector•56m ago
Yup - who cares about x-risk or red lines for domestic mass surveillance anyways? I draw my red lines at prioritizing profitable customers when heavily resource constrained. That's the true definition of evilness!
wongarsu•48m ago
I wouldn't call Anthropic ethical. But between Anthropic and OpenAI, Anthropic is the more ethical one
DonsDiscountGas•33m ago
I don't think offering a product under a certain set of terms obligates a company to maintain that offering forever. The bait and switch is certainly annoying but seeing as they're very upfront about it you can't say you weren't warned. Don't like it? Don't use it.
clementg•59m ago
I really don't want this to start being the norm
baggachipz•57m ago
I don't see how it won't be. They lose insane amounts of money on subscription plans. I'm sure they still lose money on usage-based billing, but probably not as much.
JumpCrisscross•52m ago
> They lose insane amounts of money on subscription plans

Do we know this? I’ve seen evidence they lose money on heavy users. But so do gyms.

saaaaaam•46m ago
How do gyms lose money on heavy users? A heavy gym user isn’t really costing the gym anything extra as far as I can see.
JumpCrisscross•44m ago
> How do gyms lose money on heavy users?

Most gyms sell more subscriptions than they can fit under their roof at one time. If a gym only sells to heavy users, it will either be constantly turning members away or have to buy more equipment. Its equipment will wear off faster. Depending on amenities, it will go through towels, soap, water, et cetera faster, too.

tripleee•23m ago
Gym equipment lasts 10+ years in a commercial gym, at $50/mo that's a minimum of $6k paid from a single person.

Unless they're really, seriously wasteful with the soap.. there's no chance a gym is losing money on a heavy user

charcircuit•8m ago
>I’ve seen evidence they lose money on heavy users.

Where?

cautiouscat•38m ago
I assume consumers aren’t a big note in their bottom line. I’m not actually very sure about that, just an assumption.

What I wonder however is if these tools will become something I use at work only. $100/month is already a massive stretch budget wise. If these models keep devouring tokens there’s no way I’d get the same usage time out of them for $100 in usage credits.

I just don’t think I’d use them much at all at home.

aray07•58m ago
i have never seen this before - where you offer something and then take that away
machomaster•52m ago
Really, you have never heard of shareware or trial periods?
tasuki•19m ago
Either that or it was sarcasm. What do you think more likely?
jrflo•56m ago
Still satisfied with my switch to codex/chatgpt. I couldn't imagine switching away from claude code when it first launch but with the drastically more generous usage on codex for the same subscription tier I just can't justify it.
wsatb•48m ago
I guess enjoy it while it lasts? OpenAI won't be able to subsidize that forever either.
flatline•35m ago
I don't think anyone has a firm grasp on actual inference costs -- including the research and training that has gone into those models. We've got near-frontier capabilities from open source models from China at pennies on the dollar compared to US big tech rollouts. OpenAI and Anthropic are heavily subsidizing their inference -- no wait, they are charging the most they can get away with before going public. Where is the truth?
andrewmutz•17m ago
Both can be true. They can be charging what the market will bear, and still be charging less than their costs of running it.
ChrisMarshallNY•28m ago
I'm planning on switching from the $20/month to the $100/month plan.

It's worth it, and I can afford it, but I am not really the right type of user for token-based usage. It's all for personal and free work.

micah94•3m ago
Just a personal anecdote but I have not hit any more thresholds or limits since switching to the MAX plan and so far, it's been worth it. But I do wonder how long even this will last...
andai•15m ago
A few weeks ago they massively cut usage on free tier.
dd8601fn•30m ago
I have trouble justifying gpt after that gross stuff with the war department.

Though the day is coming when there’s no distinguishing, I’m sure.

knuckleheads•29m ago
I feel like Codex made a big push to run everything on your laptop. With Claude, I get 4 cpu's, a fair amount of ram and 30gb for every one of my dumb ideas for free in the cloud containers. Codex used to be similar, but last time I tried it just kept pushing me to run it locally on my laptop, which I really did not want to do with 20 requests going at once. That's the main advantage for me at the moment.
simjnd•20m ago
What runs in cloud containers? The dev servers, builds, etc.? I tried to quickly glance at the Claude website and it doesn't mention cloud containers on their pricing page.
shimman•20m ago
I've only ever had the $20 month claude plan but last night took the time to setup opencode + openrouter paying for deepseek + glm. Previous experience, while extremely awkward, I'd hit my limit within one or two chat replies and it'd take me like 4 limit cycles to complete my task. Now I'm able to complete an equivalent task entire task for less than $2 in two cycles (ask -> revise).

I'm doing basic web development here utilizing animejs. Nothing too complicated (mostly saving time doing the scaffolding, still write the bulk of animations manually).

Truly believe that American companies are going to get completely curb stomped by China due to greed, ineptitude, and violating the social contract.

simjnd•17m ago
I've switched from OpenRouter to using Deepseek directly from their platform since OpenRouter providers were pretty flaky and inconsistent.

Deepseek V4 Flash is suprisingly capable and insanely cheap. It takes so much to get the session cost to get to $0.01.

nozzlegear•11m ago
> and violating the social contract.

I agree with you on pricing, but what do you mean by this?

sigbottle•19m ago
Codex IME is just smarter, I think it shows given both anecdotes but also how OpenAI has always been at the front of programming competitions and math problems.

But Claude models seem to be better at long term problems or more ambiguous problems.

I'm curious as to what the primary benefit here. Are there secret improvements in training? There hasn't been much in fundamental model architecture, I don't think. What about harnesses? I wonder what's pushing the AI. It seems like harnesses is the main thing pushing AI ever since CoT.

meowface•54m ago
It's very disappointing but I'm assuming it's for rational reasons on their part.
oersted•42m ago
> Pricing for both models is $10 per million input tokens and $50 per million output tokens.

The step-up in intelligence looks massive (we'll see in practice), but the price is getting to a point where it's making me question if it's even worth giving it a try.

Good competitors will probably be out soon, which should level the playing field. I am more excited about that, just the fact that they showed that such an improvement is possible. I'm okay waiting a bit longer for this to become attainable for plebs like me.

sourcecodeplz•26m ago
Why wouldn't it be? How much would you pay a scientist at this point to think about a problem for you and give you a solution?
xyzsparetimexyz•23m ago
This is probably the end of 'use the best model no matter the price'
kolinko•20m ago
The pricing can be a bit deceptive though. A good model can deliver the same results in fewer tokens.

Kind of like billing a programmer by the hour.

0erofootprint•36m ago
For me it almost immediately blocked. I had it writing code related to message digests - and it seemed to think it was too gifted for that. Gave the security warning and switched back to 4.8. Whatever... it will probably soon have the API error soon. I have mostly switched to the Codex 200 a month plan. I've found their 5.5 xhigh to be better than Opus 4.8 "ultracode." Also, i have not once seen their servers fail for compute unavailability, unlike Anthropric which happens almost ever hour.
kkoncevicius•29m ago
I had a similar experience. I wanted to test it by asking it to summarise a scientific OMICs-related paper. It gave a warning about me potentially developing a bio-weapon or something like that. And switched back to Opus 4.8.
DonsDiscountGas•36m ago
I expect that depends on demand, feedback, and whether GPT-6.0 gets released and is competitive
firemelt•34m ago
damn they are drugs dealer
Aleleo76•31m ago
Pay-as-you-go billing is a kind of drug, I use it every now and then when I'm working on a project with Opus, in a moment you spend a fortune
nicce•29m ago
> The "offer, then remove" aspect is a bit eyebrow-raising -- it feels like they are trying to get subscribers to switch to usage-based billing, which makes me wonder if we'll ever get it after that June 22nd window.

Probably all about the IPO.

smith7018•26m ago
Fwiw it's not available on my enterprise account: "Disable zero data retention to unlock Fable 5 access"
FergusArgyll•20m ago
I'm about to be priced out of SOTA llms and it's an awful feeling
matheusmoreira•16m ago
This is really sad... I really didn't want to be priced out of these models but it looks like that's going to happen sooner rather than later.
nutjob2•13m ago
> "offer, then remove"

Sounds like "bait and wait".

If you think about it, the more people pay for these new and more resource hungry models, the longer it takes for them to become no extra cost and the longer it takes the more people are tempted to pay extra.

daft_pink•11m ago
I’m just about ready to cancel my small business 5 user plan with max licenses, because although cowork is really great. I just find OpenAI/Codex to be a lot better most of the time.
systemvoltage•6m ago
It's interesting that we are seeing a time when subscriptions are not preferred and usage-based billing is.

Pay-as-you go isn't a common thing in SaaS. For example, except for AWS SES, all email providers are bulk-subscription based.

Still cheaper than Opus 4.0 and 4.1 (which was and still is $15/MTok input and $75/MTok output)

I would have expected Mythos to be much more expensive than just 2x current Opus (which is clearly cheaper to run than original Opus)

hydra-f•51m ago
As per OpenRouter:

Input Price $10/M tokens

Output Price $50/M tokens

Cache Read $1/M tokens

Cache Write $12.50/M tokens

2x Claude Opus 4.8, same as Claude Opus 4.8 (Fast)

Frankly, not even Opus 4.8 would be enough of an incentive to use at that price range (enterprise-wise; would not even bat an eye as a consumer)

zzleeper•55m ago
How credible is this benchmark? does it correlated with others real world experience?
Catloafdev•51m ago
It's a relatively new benchmark but from what I can tell it has serious cred behind it. I assume it will be picked up as part of the standard suite of CS-related benchmarks soon enough.
emp17344•51m ago
Seems like it literally popped up yesterday with the express purpose of building hype for this release.
anthonypasq•47m ago
what incentive does Cognition have for doing this? seems like complete nonsense speculation on your part.
bel8•35m ago
With billions/trillions of dollars floating around, is it hard to imagine benchmarks could be biased?

I think it's safe to assume everything AI related is heavily biased until proven otherwise. Just like in pharma.

vanuatu•23m ago
i doubt it, cog wants coding agents to be better because it directly improves their product

they aren't married to a particular lab, most of their usage is their in house model i believe

osti•7m ago
And notable absence of DeepSWE benchmark where they do badly, but somehow a benchmark that was published yesterday is in this announcement.
bfeynman•21m ago
Given it was made by cognition (team behind devin flop) who now just got to wait out until claude and gpt5 basically do all of the work for them - not very. When you read about it, the framework is highly subjective. Which very quickly becomes a problem because its based on heuristics that probably change a bunch with a better code model.
vanuatu•18m ago
the subjective framework is exactly why its good

prior bms relied mostly on unit tests or synthetic judges which are easily benchmaxxed, which leads to nobody trusting benchmarks

we need people manually checking the data for good code quality

vanuatu•20m ago
i worked on one of the benchmarks typically found in new model releases

this benchmark looks very good from the methodology. a cog researcher checking the data themselves is very high signal (not scaleable so don't take the benchmark as gospel, but directionally good)

m3kw9•48m ago
FrontierCode is likely paid for by anthropic.
reasonableklout•45m ago
Huh? It's a benchmark by Cognition which (1) is building their own models and (2) offers all providers and thus has an incentive to avoid hyping up any one too much.
jstummbillig•39m ago
But you can just say shit now. Tokens might not be too cheap to meter but saying shit increasingly is.
lanthissa•41m ago
did they not pay them enough to get good ratings on the other 3 models?

whats the logic in claiming its a borked metric when everything listed is an anthropic model.

Narretz•21m ago
There a few benchmarks out there where all existing models have abysmal scores. So it's not actually a problem if Antrophic's older models are bad, especially if the jump to the newest model is huge, and the competition is also way below it.
amluto•41m ago
That blog post really makes it look like it's graded from an LLM's estimation of an OSS maintainer's review. I see three issues:

1. That estimate could easily be wrong.

2. That estimate is, of course, usable in RL training. This isn't an inherently bad thing, and this is more or less what has improved coding models so much lately. But it does mean that other companies could and surely will do this sort of training, and Anthropic probably did too.

3. OSS maintainers are far from perfect, and there's an unfortunate uncanny valley-like effect in which a coding model can produce code that is just convincing enough to pass review even though it's actually totally wrong. I don't know whether this is a specific issue here.

This is all we need, that moment the Pelican put the leg behind the frame, we are all doomed.
mercacona•1h ago
Why always sunny days?
umeshunni•55m ago
Pelicans hate biking in the rain (as do I).
ethanlipson•1h ago
How much money do you think they spent fine-tuning on pelican SVG generation?
csomar•57m ago
Probably none. They probably have much better targets to optimize for than an SVG pelican or even SVGs in general.
tarruda•54m ago
Not as much as Qwen, since apparently 3.6 35B surpassed Opus 4.7 https://x.com/simonw/status/2044830134885306701
leecommamichael•1h ago
Looks like Fable constructed the "max" "looking" pelican of the previous model for the "xhigh" output token count of the previous model.
sarreph•1h ago
I'm beginning to wonder how much of a useful metric the pelican is because surely the frontier labs must be training their models on pelican-artistry because of how well known your test is now?
HaZeust•57m ago
I've seen this reply to Simon's benchmark for 2 years running now, and yet you still see improvements and objectively-bad results over time from new releases, even when I'm sure every frontier AI team has/had a person at least partially dedicated to better bicycle-pelican SVG outputs. Alas.
sarreph•54m ago
I had intended to caveat that: I'm sure I'm not the first person to ask about this!

> you still see improvements

This is expected if they are training their models on it, right?

> objectively-bad results

Keen to learn when this has been the case, i.e. across version increments in major models.

simonw•51m ago
I've written about this a couple of times, most notably here: https://simonwillison.net/2025/Nov/13/training-for-pelicans-...

I've been enjoying seeing how the quality of individual models differ based on the amount of reasoning effort you give them. If they were baking an a good pelican you wouldn't expect them to differ so much.

(Google Gemini are the only lab that have very clearly paid attention to the quality of SVG animals-riding-vehicles, see their announcement for Gemini 3.1: https://twitter.com/JeffDean/status/2024525132266688757 )

sarreph•49m ago
Amazing, thank you Simon! Look forward to reading.
38484858•18m ago
dont choke on it lol
llm_nerd•48m ago
I honestly assumed their comment was tongue in cheek humour, because positively no one actually cares how these models generate an SVG pelican riding a bicycle. It's some meme thing that this stuff always appears here.
BrokenCogs•42m ago
Yeah this is not a real benchmark, it's just a fun tradition everytime a new model is released
pelipost123•33m ago
"fun" / boringly predictable meme thread with 30+ replies already
modriano•46m ago
I don't know. Just looking at the bike frames (specifically the fact that the AI generated bikes have rather unsteerable front forks), it's clear to me that frontier labs aren't spending much time tuning models to make bikes look coherent, which I assume is an easier task than making a pelican riding a bike look coherent.
wongarsu•39m ago
I just run my own benchmark for "draw an SVG with $animal driving $vehicle". I won't post my choice of animal and mode of transport, but there are plenty of uncommon combinations to choose from. So far it's a fun and visually intuitive benchmark that does seem to correlate with model capabilities
bensyverson•24m ago
Simon has addressed this on virtually every new model release. He also has unpublished alternate prompts. But the larger point is: this is a fun experiment, not a serious and objective benchmark.
csomar•58m ago
Where is the clear improvement on Fable 5? The tail is misplaced.
redox99•52m ago
It's interesting that they still get the head tube / handle bar part wrong.
aarjaneiro•36m ago
Or the hands not being wings
kylehotchkiss•48m ago
How many barrels of oil are burned per pelican at Fable levels?
ge96•48m ago
need more Alex Moulton style bikes
rkuska•41m ago
Is it possible to use the credits from subscription (https://support.claude.com/en/articles/15036540-use-the-clau...) for fable?
david_shi•40m ago
that's a great looking pelican
382hi•39m ago
I'm pretty sure they're optimizing the models around these sorts of tests.
sempron64•36m ago
The pelican has looked very same-y across all frontier models, same color bike, same camera angle, etc. I suspect this challenge is already too embedded in the training data to be a good signal when it succeeds, and maybe even when it fails in pathological ways mirroring existing AI pelicans on the internet.
tripleee•17m ago
I'd say it's working great for its intended purpose. Keeps Simon on top of all these threads and funnels traffic to his site.
makingstuffs•28m ago
I could be tripping but I’m sure that is very similar to the Deepseek one from not long ago. Clearly I am too lazy to go and find it for verification.
mzhaase•35m ago
I now chat with opus about architecture, let it make an implementation plan, and then it calls codewhale with deepseek in parallel on all tasks, reviewing their output. Works pretty well.
yandie•28m ago
I use spec-driven development heavily (generate architecture docs + specs first). Opus still get lost often and have to be nudged constantly. Like it can get super detailed for something like some deep SQL optimization but it just can't keep hold of the bigger picture.
testfrequency•33m ago
I do the same, and have excellent results. Gemini 3.1 Pro high diagnosed and solved 3 complex issues today that Opus Max was stumbling on for a few hours in one shot. This was even when I started new chats and tried debugging with Ultracode instead with Claude.

As much as people on HN like to dunk on Gemini, I’ve always found it to be pretty good at understand a code base more than Claude.

FailMore•5m ago
What harness do you use Gemini in?
jp0001•12m ago
You should throw GPT into the mix to UX/UI and call it the three stooges.
jansan•9m ago
After having worked with Opus 4.7 for a while I accidentially continued a session that was using Sonnet 4.5 and it felt just very dumb. The replies were much shallower than what I was used to, context was ingored, mistakes were made. I don't think there is a big difference between Opus 4.6 and 4.8, but to Sonnet 4.5 the difference is palpable.
thisisnotclear•7m ago
I find not much difference between Sonnet 4.6 and opus models too for most task that I need - maybe my needs are not enough for frontier models
9cb14c1ec0•43m ago
I hear you, but with the hype surrounding Mythos the demand is going to be insane. I'm already hitting server errors in claude code.
cmrdporcupine•37m ago
Guess we'll see what OpenAI does with their next model release -- but this move is doing nothing to get me to come back to Claude after switching away due to their reliability issues.

In a way I relish the opportunity to just make do with cheap Chinese models, massage my prompts, and go back to coding by hand. If this is how it's going to be, screw 'em.

I don't make money on the code I am writing right now. I really don't like where this trend might go.

stri8ed•31m ago
It's not a conspiracy. There's a finite amount of compute available, and they will sell it to the highest bidder. If another company can produce the same intelligence for cheaper, then they will drive the price down.
polski-g•19m ago
Only companies can afford MRI machines, and that's okay.
•
25m ago
I still remember it. "Open"AI going API-only because GPT-3 is really really dangerous, so forget the Open in our name and all of that, you can't download our models anymore and must request access to them because they pose a THREAT.

Fast forward to today and GPT-3 has laughable performance.

shoeb00m•8m ago
Even back then there were plenty of people who got fooled by AI generated articles. It's easier to spot AI writing now because we are so used to it. They were right to be concerned; not that it achieved much since oss models run laps around gpt-3 now.
miohtama•28m ago
Mythos is from the same guy who did "GPT-2 is too dangerous to release"

https://naokishibuya.github.io/blog/2022-12-30-gpt-2-2019/

oceansky•21m ago
He was kinda right.

Lawyers, doctors, students, teachers. Lots of people using GPT models carelessly in harmful ways.

himata4113•53m ago
They're trained in a model class likely in 2t to 3t range. It's very unlikely that chinese labs have access to gpu systems capable of training models like that, let alone serving them. This requires proprietary room-scale systems which fetch a huge premium over typical 10 slot systems.

I am sure that they can develop their own equivlient version of such clusters in around 1 year though. Distilling fabel 5 will also go a long way.

logicprog•47m ago
DSv4 is nearly in the 2t range, but yes you're generally right
himata4113•43m ago
MoE experts were likely trained independently / in a sparse format. Training anything beyond 2t on typical systems would be infuriantingly slow, you could do 4t on nvidias room-scale solution, but for a reasonable training speed / batch size it caps around 3t.
sosodev•32m ago
Do you have any resources to share regarding independent expert training? I was under the impression that it's not feasible.
himata4113•19m ago
concept is similar to how it works in inference, instead of performing regressive writes to the entire model you run the whole model, but part of the model can live in system memory and get swapped in/out on demand. So only XB parameters are active in training.

edit: I am not really sure if it works like that. I haven't looked too deep into deepseek v4 pro specifically.

dmantis•47m ago
Isn't that a good thing in a way? If everyone has the weapon and defense at the same time, we will fix security holes and live safer lifes instead of having some three letter agencies and military backdoors in everything.

Pandora box is open anyway. It's better now for everyone to have the same power rather than a few national states.

lebovic•15m ago
Not sure this holds, sadly. I spent a few months reporting serious security bugs as model capabilities took off earlier this year, and only ~half were fixed. The unfixed bugs were just as critical as the fixed ones; sometimes they were even two similarly critical bugs at the same company, and only one would be fixed!

On your other point, the government still has systemic leverage and can compel access, so this doesn't remove that risk.

That doesn't mean this is the end of the world, and some balance of power is usually good. But I do think it will still increase the capabilties of rogue actors and their net harm.

mpeg•47m ago
It's not even very usable... I tried 2 different chats and both eventually got stopped due to the safeguards

One was a piece of code I gave it to improve, it did so and then started writing tests, some of which tested security so the safeguards triggered

Another was one of the cryptography puzzles I use as new model tests, which are hard to oneshot and there's no public solution anywhere, it completely refused to even try to solve it

Erem•16m ago
So the degradation to Opus 4.8 from the article isn't happening in practice?
andai•11m ago
Maybe that's only in the chat UI, and not the API?
mtkd•4m ago
No, you get a AUP violation and have to manually swap the model

(I had same issue, just asked it to check some code that 4.8 had modified earlier in day)

m3kw9•46m ago
3-5 months is a long time and they are pretty useless on arrival because the frontier models are so good, that it's hard to go back even if it's way cheaper. Your work flow is adapted to that level of intelligence for months.
hootz•27m ago
That doesn't match my experience at all. I can't see myself saying in 6 months that the current model I am using is useless, that makes no sense.

In fact, I did go back to DeepSeek V4 Flash for most of my problems as it is way cheaper and there is no need to use SOTA for absolutely everything.

xdennis•35m ago
> every bit as capable and dangerous as current day Mythos except with no safeguards

Not quite. They will definitely have "no criticism of China/communism" safeguards.

hootz•32m ago
People can work around those if they are open-weight.
xyzsparetimexyz•6m ago
Trying asking fable is Israel is committing a genocide
deaton•27m ago
Oh they might try to put in place safeguards, but Qwen has had no problem being abliterated
sosodev•25m ago
I wonder if model distillation will continue to work as well as it has. Given hidden reasoning, the ever expanding number of expected capabilities, a serious compute shortage, the looming possibility of model collapse, and dramatically higher API costs I would guess that it's getting much harder to do.
jstummbillig•23m ago
I wonder where the trees are. In this thread nobody appears to actually be talking about the model.
soledades•18m ago
> Rationalists are inventing oligopolies from first principles, absolutely incredible things happening in SF.

Based.

FergusArgyll•14m ago
I think we're about to see a big relative drop-off of open models vs closed. I don't think there'll be an open model that competes with Mythos for ~2 years.

Even OpenAI and Google are struggling to get this kind of performance. If the distillation defenses are any good + chip controls prevent China from training massive models, it's over.

ibejoeb•9m ago
I don't think China has any incentive to arm the rest of the world with highly capable models that can be used against them. Undoubtedly they will continue with the arms race, but they will preserve the best stuff for their own use.
aspenmartin•20m ago
Again correct but it overstates the issue. I can say labs don’t want this. This happened arguably unintentionally in Metas llama 4 release, it went horribly, heads rolled, and like several billion dollars were paid for new talent and the org that built llama 4 was destroyed.

Evals come from a million places and new evals and robust perturbations of existing evals abound. They test a variety of tasks in a variety of ways. All of them individually are flawed. Taken together the aggregate signal is highly useful as you more or less marginalize over a lot of different things. Not to mention these companies have plenty of proprietary internal measurements, they build benchmarks themselves to probe their models and then also have flywheel traffic and A/B tests.

You are right to call out benchmarks but to dismiss them or not take them seriously is a mistake.

taormina•9m ago
Listen, you can say “but benchmarks, the benchmarks!” all day long, but consumer know when we are being sold a lemon. If it can’t do the most basic of things at least as good as it used to, this is table stakes. Nevermind that if you can’t do the basic stuff, how on earth can you be trusted with more?
gen220•23m ago
Actually anecdata I gather on my job from myself and coworkers is the only benchmark I trust anymore, because it so heavily diverges from the “benchmarks”.
aspenmartin•19m ago
That’s your call just don’t expect anyone ever to take that seriously. It’s not like we don’t have exact evaluations like this.
recitedropper•14m ago
"Carefully and thoughtfully" is antithetical to the approach to benchmarks these days.

Maybe back when this was a scientific endeavor; not now when enormous, enormous amounts of capital are on the line. Along with an entire cult's chosen eschatology.

BoorishBears•40m ago
"Fable 5" is Opus 4.7, and the Opus 4.7 we got is a Sonnet sized model on a stronger base.

That's where all the regressions and inconsistency in experiences stem from: RL can still only go so far vs having more parameters

taormina•42m ago
I'd argue that 4.8 is a straight downgrade. For every type of task I've tried. It's been a gambit at this point. If 4.6 quits being available, I'm out at this point.
jorl17•36m ago
Opus 4.7/4.8 often over-engineers on my setups, plus:

- It talks a LOT more like GPT models. You know: wrinkle, shape, gate, coarse, scope, gap, path, production-ready-workflow-of-the-day, and so on -- "that's expected, a consequence of the previous like-driven workflow". If I wanted to get a headache using AI I would have gone with GPT in the first place!

- It outputs text in a much harder way to follow along. I can't exactly say what it is. Maybe a bit of everything? Bolds are missing, bullet points are gone, paragraphs are bland and too long, and it doesn't feel like a model programming with me, but rather a somewhat full of themselves grandpa developer looking down on me. It's very weird to describe this, but it is definitely how I feel.

Granted this can totally be because of the way it reacts to the prompts now. We've got a rather large corpus of skills and "rules and good practices" that Opus 4.6 responded to great, and maybe the new models just get turned into this when fed with them....I don't know.

Either way, with Opus 4.6 being as good as it is, I need Fable to be a significant step up to justify a price increase. if it can get me to babysit opus a little bit less on some stuff, it might be worth it. Otherwise, I'm very happy with Opus 4.6 and hope they don't deprecate it.

surgical_fire•35m ago
I actually experience 4.8 as worse than 4.6 for everyday coding tasks.
aspenmartin•49m ago
Your observations are right but pretty insane to consider them a pure PR company lol. They are making more frequent releases so yes the release-to-release quality is smaller but we’re still ascending quality and reliability curves the same way we have since GPT-3. You get a GPT4->5 leap every like 17 or 18 months I think it is
kingkongjaffa•6m ago
The gradient of improvement is absolutely not the same.
reasonableklout•46m ago
I think this says more about your type of work than anything. For bugfinding/incident response in distributed systems - which often involves extensive use of Datadog/Sentry MCPs and poring over heaps of logs in addition to reading tons of code - 4.8 has been significantly better than 4.6.
piyuv•46m ago
Current AI hype is built on marketing and PR, not capabilities, and has been from the start.

I still remember Sam Altman “begging AI to be regulated” and AGI being “some thousand days away”.

Breed faster horses and hope one will birth a locomotive.

MattGaiser•42m ago
Doesn't this suggest your use case is simply insufficiently complicated?
pinkmuffinere•40m ago
> catchy names like Opus, Mythos and Fable trying to get you to think that these software products are actually super-human life changing experiences

This is just good business sense. In what scenario would you ever make the names dumb and forgettable?

> Boris Cherny coming to HN “Hi! it’s Boris from the Claude Code team” to get real tech people’s goodwill.

This is good customer support, lol. From what I can tell, it is indeed Boris Cherny responding, not outsourced to AI or other staff. You're really getting a response from Boris. I suppose that is PR, but it's not unjustified PR, it's accurate.

I'm not even a crazy AI fan, but your criticisms are ridiculous here. It reminds me of the quote from Knives Out -- "Your Honor, she endeared herself to him through hard work and good humor."

IshKebab•30m ago
> In what scenario would you ever make the names dumb and forgettable

Clearly you've never bought a TV or headphones!

xpct•39m ago
Indeed, hearing "Mythos-class model" felt very icky to me.
b3kart•28m ago
https://en.wikipedia.org/wiki/Typhoon-class_submarine vibes
system2•37m ago
You are right; all I noticed was a big-time slowdown. They increased the quota, but I cannot even reach the end of the day with these speeds. .NET coding somehow improved, though.
gruez•36m ago
I don't get it, your complaint is that they have catchy names rather than dry names like GPT-5.6? Does OpenAI hype their models less?
Aperocky•30m ago
Oh, Far less.

It's getting to a point that it's offputting, and the next step would be to put it into "untrusted" bucket. Opus 4.7 already burned their credibility once, 2 more strikes remain.

avaer•29m ago
If you truly believe this, you've discovered a superpower over everyone else in the industry.

While everyone else is wasting time and money on the slower, more expensive models, you've found a way to outpace everyone for less money. Everyone else is wrong and you will get rich.

(I don't actually believe the premise is true, I'm just pointing out the logical conclusion to what you're saying so maybe we can reconsider the premise)

matheusmoreira•28m ago
> Boris Cherny coming to HN “Hi! it’s Boris from the Claude Code team” to get real tech people’s goodwill.

This is a good thing. I wish every company would do this. I subscribed to Proton Mail after interacting with someone from their team here on HN.

jwpapi•27m ago
I don’t even think that Boris is really just one person. He apparently vibe coded Claude Code and is responding on Threads, Twitter, HN and everywhere.
thefreeman•27m ago
How can you make this comment before even having a chance to try the new major model revision?
atleastoptimal•15m ago
> At this point Anthropic is a pure marketing and PR company. Super catchy names like Opus, Mythos and Fable trying to get you to think that these software products are actually super-human

Lol anti-AI bias on HN is crazy. Simply giving your product a quirky name is now being considered manipulative advertising. Is just doing normal PR and marketing something AI companies aren't allowed to do?

astrange•15m ago
> Super catchy names like Opus, Mythos and Fable trying to get you to think that these software products are actually super-human life changing experiences.

They're originally named after the blends at a nearby coffee shop.

https://postscript.co/pages/brew-guide

I've noticed nobody at HN knows what "marketing" is or how to do it. It's not just naming things and being evil and cynical is not the most successful method.

…also frontier models are a superhuman life changing experience. If they aren't, what possibly could be?

bitpush•9m ago
This is interesting. Do you have any source?
mawadev•7m ago
When the Ai overlord is descending into pleb space to say Hi, you know stuff is real
chis•6m ago
Hackernews not blindly hate on AI challenge: impossible
This premise is based around the assumption that Moore's law is still working, which it very much isn't [0]

[0] https://cap.csail.mit.edu/death-moores-law-what-it-means-and...

andrewmunsell•14m ago
Improvements in model performance aren't always strictly compute-constrained in a way that makes them reliant on Moore's Law. Open weight models-- in particular, from Chinese labs-- are optimizing model intelligence with less compute. They're "behind" frontier models by months, but as others have noted, it's possible to get Sonnet 4.5+ level performance at reduced cost, today, from open weight labs.
dyauspitr•26m ago
Hardware manufacturing hasn’t caught up yet. Once it does, especially in China these token prices are going to drop hard.
BoorishBears•12m ago
https://lordslibrary.parliament.uk/select-communications-off...

Are they really making 12,000 arrests a year over tweets and posts?

10xDev•18m ago
>the quality of discussion on HN has gone to shit, i miss when model released used to have actual informed takes from people that used them or substantive discussion about the system card

Your comment earlier.

Edit: also, not much change in the last 10 years in prison population. https://commonslibrary.parliament.uk/research-briefings/sn04...

m0guz•20m ago
> The Democracy Index published by the British media company

We decided that we aren't one of those authoritarian countries.

Petersipoi•11m ago
> published by the British media company the Economist Group

Haha, it's literally the first sentence of the Wikipedia page. That's fucking funny. Try again.

Karrot_Kream•8m ago
That is 1000x better than griping about the privacy policy, capacity issues, token costs, and how trendy the names are for the new models (???). The bar is on the floor and I just want it at my knees.
estearum•12m ago
Fair point! Edited to remove.
ygjb•33m ago
Setting aside the simple fact that there is no ethical consumption under capitalism, the reality is that regardless of how Anthropic feels, it is becoming clear that many, if not all countries regard AI developments as strategic technologies (and they should).

Anthropic needs to be at least somewhat in the good graces of a capricious administration that is already under pressure from businesses and citizens to regulate AI companies across multiple different domains, whether it's energy consumption, job displacement, military and defense applications, surveillance, etc.

If Anthropic wants to survive, they need to acquire influence with the government that most impacts them as an American company, and a massive exporter of services in the AI space to other countries, otherwise they could get locked down and locked out of the market for national security reasons.

It sucks, but sometimes the survival choice is to make an ethical compromise in hopes that you can still be around to make better decisions later.

ericmay•25m ago
> Setting aside the simple fact that there is no ethical consumption under capitalism

This "simple" fact needs quite a bit of additional context and work. Making grandiose ethical claims like this can be countered with other grandiose claims such as the fact that there is no ethical existence under communism or socialism.

ygjb•5m ago
Sure. Why not, I'm bored today and waiting for some stuff to finish up :D

The fact that there is no ethical consumption under capitalism is not material to whether or not ethical existence is possible under communism or socialism. In order to survive in a capitalist society, one inherently has to make choices that require trade-offs, and those trade-offs are burdened by a history of decisions made not just by the people alive today, but our ancestors as well. Does that mean I walk around chanting "Reparations", "Land-back", or other calls to action? No, but I do acknowledge that there are unresolved issues and as a Canadian, I know we need to do more to resolve treaty issues, and environmental issues, and system discrimination. I also know that Americans need to do better to address systemic discrimination and many, many other issues. It also doesn't mean I want to give back my house, or give away all of my possessions. It just means I try to make good choices and support businesses and people that are open about the trade-offs they make and try to engage as ethically as possible.

Acknowledging those facts doesn't absolve us of responsibility, it's a framework that allows folks concerned about whether or not they are doing the right thing to accept the trade-offs that they choose to make and be responsible and accountable for those choices to themselves or their communities.

We live in a world with scarce resources. It's possible that with a foundational redesign of the global economy, and the requisite authoritarian government that would be required to force such a redesign, we could eliminate food scarcity, solve energy scarcity, and make sure that everyone has a place to live. Those trade-offs are probably not worth the ethical cost in political and physical violence required to accomplish it. We have seen the trade-offs that happen when the powerful are able to exploit communist or socialist governments. We are seeing the "late stage capitalism" impacts of allowing the powerful to exploit capitalism in democratic societies. Acknowledging that the current capitalist system has lead to the greatest prosperity for the upper echelon (financially) of humanity, and a dramatic reduction in global poverty shouldn't obscure the reality that much of that wealth comes from exploitation of people and the environment.

It's a huge problem to unwind, and we can't let the burden of every choice that we make stop us from trying to do better, but we (as in society in general) can't do better if we don't at least acknowledge the compromises we are making along the way, and try to plan to fix it in the future.

Probably a topic better suited to beer and a pub setting than HN though :P