frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

Open in hackernews

Tell HN: A flood of reports of Opus 5.5 being nerfed

12•b--l•4h ago
Here are several user reports of Opus 5.5 being nerfed:

https://www.reddit.com/r/ClaudeCode/comments/1xr4urz/opus_55_in_the_past_two_weeks/

https://www.reddit.com/r/ClaudeCode/comments/1xr9x5y/the_nerf_is_real_thank_you_uwum1ha1nho/

https://www.reddit.com/r/ClaudeCode/comments/1xqvqip/anthropic_should_offer_a_free_reset_and_restore/

https://www.reddit.com/r/ClaudeCode/comments/1xr0nz5/either_a_lawsuit_an_apology_or_never_touching/

https://www.reddit.com/r/ClaudeCode/comments/1xl72og/opus_56_imminently_about_to_release/

https://www.reddit.com/r/ClaudeCode/comments/1xqtslm/rant_anthropic_stop_silently_degrading_models/

https://www.reddit.com/r/ClaudeCode/comments/1xr8jod/opus_high_55_nerfed/

https://www.reddit.com/r/ClaudeCode/comments/1xqujuh/opus_55_started_coming_up_with_unintelligible/

https://www.reddit.com/r/ClaudeCode/comments/1xqfp7m/opus_55_xhigh_just_deleted_all_my_apps_data/

https://www.reddit.com/r/ClaudeCode/comments/1xr488d/weve_been_nerfed/

https://www.reddit.com/r/ClaudeCode/comments/1xr6r3t/has_claude_been_made_dumber_again/

https://www.reddit.com/r/ClaudeCode/comments/1xr8aic/fable_opus_55_noticeable_performance_regression/

https://www.reddit.com/r/ClaudeCode/comments/1xrc97q/claude_again_ignoring_all_hooks_first_time_since/

https://www.reddit.com/r/ClaudeCode/comments/1xphsj9/opus_55_is_trying_to_destroy_my_codebase_recently/

These are all within the last week.

I have noticed the same thing myself. I am going to pause Opus 5.5 use. I find it really scummy business practice. We trust them that what is behind the string "opus-5-5" is consistent and what we signed up for. Of course behind the scenes they can do whatever they like and serve whatever model they like under that string. It is a scummy and deceptive business practice though.

Comments

gigatexal•4h ago
I noticed the same at work using Opus 5.5 on medium which was the sweet spot. It’s now just not great.
Bender•4h ago
For me Claude was nerfed when:

- They put the shock collar on it [Cyber] Your session has been paused - meaning I have to start a new session. That is also on Opus 4.8 now, just not quite as sensitive as on 5.5. (Defensive coding, defensive system configuration) In my opinion Claude is not permitted to write secure code or analyze ones existing code for bugs that may be security related. Instead of the shock collar, just report anything illegal I ask Claude to do to Palantir and other related platforms like everyone else does.

- They downgraded my 20x account to a 10x, so I downgraded it to the lowest one. I would have paid for Mythos if they would have permitted me to verify myself.

- I keep hitting context memory limits and Claude starts acting like it has dementia, accusing me of doing things that it did. Claude is not proactively compacting when it should, especially on max. It says max does not matter but in my experience it very much does.

I have not logged in for a couple weeks so I have no idea if the model itself has been nerfed. The feeling I got is that they want to focus on enterprise customers and would prefer individuals went away so I cleared out my data and moved my projects elsewhere that does not block me for wanting to secure my code. Perhaps that is their way of sending more individuals away? Their message has been received loud and clear.

turtleyacht•3h ago
Why not use a distributed benchmark? Tokens are shared across volunteers; everyone gets informed of the nerf simultaneously. No one need be surprised.
faangguyindia•1h ago
It seems like pre-IPO companies need to balance "cost" vs. "optics" and it's one of the metrics they optimize.

So, launch at an "exceptional" state and then cut costs after some time following the release, then repeat to make it appear like lots of advancement is happening.

richstokes•1h ago
I have zero evidence. But anecdotally (and working with Claude every day) I see wild swings in Opus/Fables abilities day to day. It really does feel like they are twiddling knobs behind the scenes and hoping no one notices.
oleksg•1h ago
Oh man, can't wait for open-source to catch up...
kasey_junk•1h ago
> We trust them that what is behind the string "opus-5-5" is consistent and what we signed up for.

Do you run evals as a matter of course? Everyone I know that does shows high levels of variance across them under the best case.

That’s not to say that the labs don’t downgrade models at times, just that without any measurement it’s a non-interesting assertion.

Ask HN: What are you working on? (November 2026)

165•david927•7h ago•564 comments

Ask HN: How do you manage your AI agents' context across clients and projects?

16•Michel_Aventin•1d ago•18 comments

I am building Threadz. Human first AI writing app

3•shoebilyas_hanz•4h ago•1 comments

Tell HN: A flood of reports of Opus 5.5 being nerfed

12•b--l•4h ago•7 comments

Ask HN: How did you convince family and friends to join your XMPP/Matrix server?

97•mtlynch•1d ago•91 comments

Tell HN: Gemini trains on chat history, even for subscribers (personal accounts)

734•jameslk•4d ago•201 comments

Ask HN: What in the world is taking Ubuntu so long?

217•linsomniac•2d ago•139 comments

Ask HN: What's your current AI agentic setup?

563•eggbrain•4d ago•695 comments

OpenAI seems to be silently re-enabling model training on Codex chats

534•user052919•5d ago•163 comments

Ask HN: What are your advice for a CS/IT student for the future?

5•L0in•17h ago•18 comments

Gitbook Breached

165•punchmesan•5d ago•45 comments

Claude usage credits purchased after Dec 7 will expire 12 months after purchase

17•bbg2401•2d ago•10 comments

Tell HN: Don't use Postman, they proxy your info without your permission

111•neya•5d ago•8 comments

HN's HTML has changed slightly

3•1vuio0pswjnm7•9h ago•2 comments

I turned an ESP32-S3 into a Tailscale gateway with recovery functions

8•Mattboxx•1d ago•2 comments

We're bringing back the HN meeting in Mexico City

10•ysangkok•1d ago•0 comments

Ask HN: If LLM reverse engineering is deemed illegal, is that precedent for OSS?

4•apatheticonion•1d ago•10 comments

Is YouTube starting to protect channel RSS feeds?

6•kradeelav•1d ago•1 comments

Ask HN: What tech companies do you think have a good moral compass?

6•gehwartzen•1d ago•16 comments

Seeking advice: Wix stolen my .com domain

13•wixcom•2d ago•12 comments

Ask HN: What fun things to do with an iPhone 11?

9•wanderingpixel•2d ago•7 comments

Tell HN: Be Careful with Stripe Connect

17•breue•2d ago•4 comments

Slickdeals.net Is Compromised

22•intenex•2d ago•2 comments

You've reached the end!