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Tangled – We need a federation of forges

https://blog.tangled.org/federation/
84•icy•33m ago•41 comments

Soft launch of open-source code platform for government

https://www.nldigitalgovernment.nl/news/soft-launch-for-government-open-source-code-platform/
343•e12e•5h ago•101 comments

Ghostty is leaving GitHub

https://mitchellh.com/writing/ghostty-leaving-github
2985•WadeGrimridge•18h ago•894 comments

Letting AI play my game – building an agentic test harness to help play-testing

https://blog.jeffschomay.com/letting-ai-play-my-game
33•jschomay•1h ago•1 comments

HashiCorp co-founder says GitHub 'no longer a place for serious work'

https://www.theregister.com/2026/04/29/mitchell_hashimoto_ghostty_quitting_github/
299•terminalbraid•2h ago•154 comments

GitHub – DOS 1.0: Transcription of Tim Paterson's DOS Printouts

https://github.com/DOS-History/Paterson-Listings
29•s2l•3h ago•1 comments

Show HN: Adblock-rust Manager – Firefox extension to enable the Brave ad blocker

https://github.com/electricant/adblock-rust-manager
23•electricant•2h ago•10 comments

Bugs Rust won't catch

https://corrode.dev/blog/bugs-rust-wont-catch/
441•lwhsiao•12h ago•238 comments

Improving ICU handovers by learning from Scuderia Ferrari F1 team

https://healthmanagement.org/c/icu/IssueArticle/improving-handovers-by-learning-from-scuderia-fer...
9•embedding-shape•1h ago•5 comments

Before GitHub

https://lucumr.pocoo.org/2026/4/28/before-github/
563•mlex•17h ago•180 comments

Stardex Is Hiring a Founding Customer Success Lead

https://www.ycombinator.com/companies/stardex/jobs/6GCK1HC-founding-customer-success-lead
1•sanketc•2h ago

How ChatGPT serves ads

https://www.buchodi.com/how-chatgpt-serves-ads-heres-the-full-attribution-loop/
418•lmbbuchodi•14h ago•282 comments

Show HN: Rip.so – a graveyard for dead internet things

https://rip.so
123•bozdemir•5h ago•88 comments

Show HN: Rocky – Rust SQL engine with branches, replay, column lineage

https://github.com/rocky-data/rocky
90•hugocorreia90•23h ago•26 comments

Show HN: Auto-Architecture: Karpathy's Loop, pointed at a CPU

https://github.com/FeSens/auto-arch-tournament/blob/main/docs/auto-arch-tournament-blog-post.md
198•fesens•21h ago•58 comments

Coffee with a splash of physics: how to make the most out of your brew

https://physicsworld.com/a/coffee-with-a-splash-of-physics-how-to-make-the-most-out-of-your-brew/
36•sohkamyung•2h ago•19 comments

He asked AI to count carbs 27000 times. It couldn't give the same answer twice

https://www.diabettech.com/i-asked-ai-to-count-my-carbs-27000-times-it-couldnt-give-me-the-same-a...
167•sarusso•1h ago•202 comments

Withnail's Coat and I

https://ontherow.substack.com/p/withnails-coat-and-i
113•apollinaire•1d ago•14 comments

HardenedBSD Is Now Officially on Radicle

https://hardenedbsd.org/article/shawn-webb/2026-04-26/hardenedbsd-officially-radicle
111•lftherios•7h ago•24 comments

OpenAI models coming to Amazon Bedrock: Interview with OpenAI and AWS CEOs

https://stratechery.com/2026/an-interview-with-openai-ceo-sam-altman-and-aws-ceo-matt-garman-abou...
300•translocator•19h ago•97 comments

Low-Compilation-Cost Register Allocation in LLVM-Based Binary Translation

https://dl.acm.org/doi/abs/10.1145/3767295.3803591
46•matt_d•7h ago•1 comments

GitHub RCE Vulnerability: CVE-2026-3854 Breakdown

https://www.wiz.io/blog/github-rce-vulnerability-cve-2026-3854
404•bo0tzz•22h ago•86 comments

Who owns the code Claude Code wrote?

https://legallayer.substack.com/p/who-owns-the-claude-code-wrote
471•senaevren•1d ago•441 comments

I won a championship that doesn't exist

https://ron.stoner.com/How_I_Won_a_Championship_That_Doesnt_Exist/
210•SEJeff•17h ago•113 comments

Talkie: a 13B vintage language model from 1930

https://talkie-lm.com/introducing-talkie
720•jekude•1d ago•311 comments

Gallium oxide electronics withstand extreme cold

https://discovery.kaust.edu.sa/en/article/26858/gallium-oxide-electronics-withstand-extreme-cold/
65•giuliomagnifico•2d ago•6 comments

Warp is now open-source

https://www.warp.dev/blog/warp-is-now-open-source
326•meetpateltech•22h ago•97 comments

Behavioral timescale synaptic plasticity rewires the brain after an experience

https://www.quantamagazine.org/a-new-type-of-neuroplasticity-rewires-the-brain-after-a-single-exp...
140•ibobev•2d ago•9 comments

Your phone is about to stop being yours

https://keepandroidopen.org/en/
1530•doener•23h ago•743 comments

Facebook Has a Health Scam Problem

https://www.nytimes.com/2026/04/27/well/facebook-supplements-health.html
14•cainxinth•55m ago•1 comments
Open in hackernews

He asked AI to count carbs 27000 times. It couldn't give the same answer twice

https://www.diabettech.com/i-asked-ai-to-count-my-carbs-27000-times-it-couldnt-give-me-the-same-answer-twice/
166•sarusso•1h ago

Comments

rsynnott•1h ago
I am... unsure why anyone would think LLMs would be able to do this. They are not magic oracles. Like I think even most humans would be extremely bad at this.

Like, are people actually using LLMs for this? Please do not, it won't work.

Nicook•1h ago
You are severely overestimating the average, or even above average understanding of LLMs.
bluefirebrand•1h ago
Not to mention the fact that LLM marketing is trying to convince us that they can do anything
tarkin2•1h ago
OpenAI etc, are, however advertising them like they are magical oracles, on the verge of lifting humanity to next phrase of civilisation. The idea the majority of users know what nondeterministic even means it's a massive, massive ask
PUSH_AX•1h ago
It’s worse, I bet there are apps in the App Store that do this, the users just have no idea on the accuracy
vector_spaces•1h ago
There is a very popular app for macro counting called Cal AI that was reported to have been written by a high school student with over $1M in revenue. Looks like it was just acquired by MyFitnessPal
lordgrenville•1h ago
Wow, yeah. "The result is an app that the creators say is 90% accurate".

https://techcrunch.com/2025/03/16/photo-calorie-app-cal-ai-d...

Jtarii•1h ago
>I am... unsure why anyone would think LLMs would be able to do this.

Well firstly the average IQ is 100. And also because people market products to consumers that claim to be able to count carbs from images. If you don't know the limitations of LLMs then there would be little reason to doubt it for an uniformed or below average intelligence person, of which there are hundreds of millions.

kioleanu•1h ago
Yes, people are using LLMs for this because that is how they've been marketed, like being able to solve every day tasks like a personal assistant on one hand, but also like researchers being able to solve old problems that humans couldn't crack.

Does the model say it can't do that when asked? No, it answers confidentely.

Also it's easy to trust it if you don't know how it works

drtz•1h ago
Would people really trust their personal assistant to tell them how many calories are in a sandwich just by glancing at it on a plate? I'm doubtful, and I would also expect a diabetic to be even more skeptical.
tempaccount5050•25m ago
Yes.
sjsdaiuasgdia•1h ago
Some people are asking LLMs what's on the menu of restaurants they are actively sitting in, possibly with a menu on the table in front of them.

Some people have a very poor understanding of what LLMs are good for. Some people do see them as magic oracles.

throwaway260124•1h ago
But nothing prevents llms from being RLed to do this right?

But does training llms to be better at this, improves their world model or does it only make changes at the surface?

vidarh•1h ago
Yes, something prevents llms from being RLed to do this: You can't see through something opaque to determine whether there's something high calorie or low calorie out of sight.

The problem itself is unsolvable given the data provided.

You could conceivable make it better at making guesses, but they will inherently always be guesses that will sometimes be wildly off.

pjc50•1h ago
> You can't see through something opaque to determine whether there's something high calorie or low calorie out of sight

https://www-users.york.ac.uk/~ss44/joke/3.htm "There is at least one field, containing at least one sheep, of which at least one side is black."

ben_w•1h ago
Estimate the calorie count of this door handle: https://m.youtube.com/watch?v=VDSzY52Mkrw&pp=0gcJCVACo7VqN5t...

Extreme example perhaps, but no, you can't just turn pixels into calories. Right now I'd be impressed if we could reliably estimate volume to within 30% from a photo, but even with that correct the contents of the food can easily be way off without visible sign.

rsynnott•57m ago
Okay, so take the sandwich. There is no way to know what is in it by looking at it. No amount of optimisation will fix this.

I'm sure one could produce a CV model that was a lot better at guessing here than these LLMs are, but fundamentally it is still guessing.

AndrewKemendo•1h ago
The vast majority of people using LLMs in my experience use them as though they are Oracles

They are surprised and upset when the Oracle is not perfect

Go ahead and search around on hacker news you’ll see precisely the same pattern with people who are ostensibly engineers and hackers

It’s actually pretty mind boggling but then again humans never fail to surprise and disappoint

hansmayer•1h ago
I mean people will shamelessly paste you a wall of text from LLM while chatting with you to prove a point, probably thinking how they outsmarted you now...
faangguyindia•1h ago
It’s because AI can debug a programme and people start thinking it can do fitness and health stuff too, but the thing is, there is no “instant-reacting compiler" for health or fitness. Things change over a long time, till then AI would have run out of context or lost the data from its cache, or the user may have got bored and deleted their account.
acchow•1h ago
Most people are convinced LLMs can do this.

Cal AI, which claims to generate a nutritional breakdown based off a photo, has $30 million in annual recurring revenue.

rsynnott•1h ago
... Bloody hell. I mean that's basically fraud, surely. It is _not possible to do this even vaguely accurately_.
heysoup•1h ago
They sold the idea that LLMs "have" information. That the LLM "is" intelligent.

Truth is the LLM is good at making intelligent decisions. But in order to make intelligent decision, you need context.

If you give proper context -> ask the LLM -> get almost perfect result every time.

Anything else is rolling dice, a very special type of dice, but dice anyhow. Not magic.

jeroenhd•1h ago
https://xkcd.com/1425/ strikes again.

As far as consumers know, LLMs can identify the towns pictures were taken (without metadata), can summarize entire movies, generate clips of your kid flying a rocket to the moon, can translate images from any language imaginable, but somehow they cannot estimate the calories in a cheese sandwich.

The supposed professional posting about an LLM deleting their prod database for their non-existent company asked the AI to explain itself. That's the level of LLM knowledge you should expect from most people that actually work with these tools.

kdheiwns•1h ago
They're marketed as AI. AI has a long standing image built up by movies and other media of being some omniscient computer capable of analyzing the world. These AI companies are very aware of this and leverage it.

And a person with sufficient knowledge could easily give a rough estimate of the calories. A slice of store bought sandwich bread of a given thickness generally has calories within a certain range. So do cheese slices. It's elementary school health class material. We all learn how to calculate calories in a meal. Packaging on food also always has calories, so clearly people know how to estimate it fairly accurately.

If a fifth grader can calculate it but an AI can't, that says a lot about how bad these AIs are. We'll get another series of paid and bought articles saying "AI analyzed IMPOSSIBLE math problem beyond human comprehension and solved it with FACTS and LOGIC", while at the same time being told "bro no you can't expect an ai to calculate calories in a sandwich bro that's impossible bro if you even try that then you're insane for even thinking ai should be used that way bro". These companies need to decide: is AI smart enough to solve hard questions, or is it too useless to calculate something any kid could do by googling calories in a slice of bread and doing some basic arithmetic?

rsynnott•59m ago
> Packaging on food also always has calories, so clearly people know how to estimate it fairly accurately.

That's not done by looking at it and guessing (or at least it _shouldn't_ be; manufacturers have been known to do this but it's bad practice and may cause them regulatory problems). In an ideal world it's done with one of these: https://en.wikipedia.org/wiki/Calorimeter ; less ideally it can be estimated based on the ingredients.

jihadjihad•1h ago
> They are not magic oracles.

I came across a LinkedIn post a couple days ago where someone had asked ChatGPT, "What are the top things you get asked about $NICHE_INDUSTRY_THING_I_AM_SELLING?"

As if there is introspection like that at the meta level, where ChatGPT could actually provide hard numbers around its own usage and request patterns.

The fact that these products work with natural language beguiles people into thinking they are, indeed, magic oracles.

Ekaros•1h ago
This is the weird intersection where I think that data might exist and LLM might be able to query it. But any company would never give it out. So the bot would not have access to it.
pjc50•1h ago
> They are not magic oracles.

Anthropic's trillion dollar valuation hinges on the idea that it is just that, a magic oracle that can replace any worker for any type of task. Any programmer, any author, any musician, any kind of clerical work. All we've asked here is "sudo evaluate me a sandwich", the sort of estimation task that humans with internet resources might reasonably be expected to do, and it's given up?

(It would be fun to compare this to sending the picture out on Mechanical Turk and asking humans to eyeball the calorie count of said sandwich...)

ambicapter•1h ago
If the LLM can correctly identify a food item some high percentage of the time, why would it be magic for it to guess the amount of calories in an object? It's perhaps a lookup and some simple math as an extra step.
DontchaKnowit•1h ago
Not remotely surprising to anyone whose ever counted calories or carbs
alexdns•1h ago
Non deterministic AI returns non deterministic results who could've guessed
sumtechguy•1h ago
I wanted an accountant I got a poet.
tom1337•1h ago
random number generator returns random numbers on each call. more news at 11
falcor84•1h ago
Even more news at randint(1, 12)
jaccola•1h ago
It’s just an impossible problem. Photons don’t provide sufficient information to determine calories (at least not in any way they could practically be captured). Inside that sandwich could be drenched with olive oil or it could be hollow cheese with lettuce. It’s impossible to tell.
2ndorderthought•1h ago
The average person has no idea this is true. And the average person cannot tell when this is the case. So we have a bunch of people, going their way through school, and then when they get stuck relying on AI. The future is gonna be wild.
lordleft•1h ago
Yep. And it doesn't help that the people selling AI products act as if they're going to build God. Going, "well AI can't do that" isn't going to fly when you are lax about communicating its limitations!
2ndorderthought•1h ago
It also doesn't help when the messaging is linked to how "there will be no jobs where you use your brain anymore everything will be automated". What motivation does the average 16 year old have to try hard and learn anything beyond what they immediately need.

No jobs, ai Jesus is coming, and if you use ai it will use all of the worlds compute power to try to convince you it's correct even when it's not.

engineer_22•1h ago
I am asking a lot here, but school needs to be training people what AI is and what it's weaknesses are and how to use it... My school taught me to use a calculator. It also taught me how to check my work when I relied on the calculator.

AI is a very complicated calculator - you give it an input, magic happens, it gives you an output. Really no different, to a layman.

2ndorderthought•1h ago
It's more complicated than a calculator. Even researchers who have dedicated their lives to the field don't know all of the limitations of any given model. That fact alone isn't helpful when a model is 80% correct in one area but 2% in another.
pirates•31m ago
If even experts in the field don’t know all of the limitations then it’s even more important to stress that relying on the output of an LLM is a poor choice without additional checking and verification.

Even with calculators, I was taught that you should double check by hand sometimes to make sure you got it right.

jaccola•1h ago
To be fair, this should probably be covered by basic physics/maybe cooking classes. “You can’t determine the calories in food by looking at it” isn’t really ML specific.
2ndorderthought•1h ago
Won't help much if kids are ai'ing their way through physics then ten years later need to go on a diet having not applied the knowledge possibly ever or exercised their critical thinking skills
garciasn•1h ago
Considering the lack of basic math skills I encounter each and every day, I don't think schools did enough; they certainly aren't going to do enough w/LLMs.
Ekaros•1h ago
Knowing the lack of understanding of basic chemistry and physics like fundamental thermodynamics... I have little hope any population can be trained to understand LLMs sufficiently...
renticulous•1h ago
Here's technical literacy of population on display. I love these prank examples which show the true education of populace.

https://www.youtube.com/shorts/B7c9qJcRnVk

fcarraldo•1h ago
True education? What idiot would say yes to this?

Even if you _know_ the debit card transaction is safe, there’s no reason to risk it when a weirdo is filming you with some wild contraption.

rcxdude•50m ago
Anything like this is going to have a very heavy selection bias, don't take any of this kind of content as a reflection of the average person.
WarmWash•25m ago
Many of of witnessed the technical literacy of the general population when we ran to show them ChatGPT 3.5, and they just kind of shrugged like "So? What are you showing me?"
lesuorac•53m ago
If you're looking for a citation about this, the 1999 Dunning-Kurger paper "Unskilled and unaware" [1] is about this.

People who are unskilled at a task are unaware of what that task performed correctly is. So, somebody who can't count calories is unable to tell that the AI can't perform the task correctly either.

[1]: https://pubmed.ncbi.nlm.nih.gov/10626367/

hombre_fatal•29m ago
Fwiw invoking Dunning-Kruger is beyond trite at this point.

Which is a good thing because it means we can talk like normal humans ("people don't know that it's unreliable") instead of acting like we're making such a profound claim that it needs a citation and psychological dissection.

Ekaros•1h ago
Then it should refuse to answer 100% of time.
jaccola•1h ago
Indeed, I think any reasonable human might say “A few hundred calories but without measuring the ingredients I might be way off”. I think LLMs could get there, I don’t see anything stopping that. Though they have been notoriously bad at this so far.
falcor84•1h ago
I don't think refusal is the right approach. I would much prefer that it respond with something like:

> There is not enough information to make an accurate estimate, but if you'd like, I can take a stab at it. If so, how much effort to put into it?

> Yes, go ahead and spend up to 5mins and $1 to analyze it.

> Done, I've had 100 subagents analyze the image and have arrived at a 95% confidence interval of the portion containing ...

p-e-w•1h ago
Then the correct answer is “I can’t tell.”

Not “Here’s a random guess that I just pulled out of my ass.”

LLMs have picked up the bad habit of trying to give an answer when no answer can be given from scientists, who overall don’t say “I don’t know” nearly as often as they should.

agentultra•1h ago
LLMs had no agency to choose such a course of action.

They’re algorithms and they were designed this way.

jeroenhd•1h ago
I tried asking LLMs about food before. They all say "I can't tell for certain, but this is an estimate based on the ingredients I can spot/infer/guess".

You need to write a specific prompt to avoid any warnings.

Of course a lot of people don't know what limitations LLMs have, so there's some value to a blog post about it, but it's not as black-and-white as the article might suggest with its graphs.

The prompt (documented here: https://www.diabettech.com/wp-content/uploads/2026/04/Supple...) lists specific instructions and a specific output format that doesn't allow the LLM any room for explanation or warning in processable data (only in notes fields). In fact, the prompt explicitly tells the LLM to ignore visual inferencing for some statistics and to rely on a nutrition authority instead.

Even in that intentionally restricted format, the English language output uses words like "roughly" and "estimated" in the LLMs I've tested.

Sure, if you take the numeric values and plot them in graphs, you get wildly inconsistent results, but that research method intentionally restricts the usefulness and reliability of the LLMs being researched.

What's much more troubling is this line from the preprint:

> The open-source iAPS automated insulin delivery (AID) system now offers food analysis through APIs from OpenAI, Anthropic and Google [8]

The linked app does seem to have a disclaimer, though:

> "AI nutritional estimates are approximations only. Always consult with your healthcare provider for medical decisions. Verify nutritional information whenever possible. Use at your own risk."

Ukv•1h ago
> Then the correct answer is “I can’t tell.”

From the paper they're using structured JSON schema mode opposed to freeform answers, so it can't. Models do typically caveat their answer for questions like this, in my experience.

professoretc•46m ago
They'll qualify their answers in English but as the article mentions, if your prompt asks for a confidence score, that "uncertainty" doesn't translate into low numerical confidence.
Ukv•3m ago
Quantifying their own confidence is also something they're not good at and which the format would prevent them from refusing to do or preceding with a caveat. Particularly since the response format seems backwards - giving confidence, then carbs estimate, then observations/notes, rather than being able to base carbs estimate off of observations/notes and then confidence estimate off of both of those.

> They'll qualify their answers in English but [...]

That the default user-facing chat gives a warning is the key part IMO. I don't think expectations of there being no "wrong way" to use the model can extend to restricted format outputs with long custom system prompts.

therobots927•1h ago
Why is the AI answering questions without answers then?
pohl•1h ago
could be because, at the end of the day, it's just predicting the next likely token
therobots927•12m ago
The paper millionaires did NOT like your comment.
unsupp0rted•1h ago
And what if that guy in the surveillance video is just 2 kids in a trench coat? There's no way for AI to be sure from the photons: we should scrap it.
jeroenhd•1h ago
It's not even impossible from a technical point of view.

Your cheese sandwich may contain a lot more or a lot less calories, even if you take the numbers from the packaging and calculate the correct ratios by weight. The calories on the label are based on an average and individual packages may contain more or less of any listed nutrient to some margin. Of course, counting calories is meaningless if not done on a long-term scale anyway, but on a long-term scale the LLM doesn't need to guess the correct amount either.

ge96•1h ago
I was thinking at least if you had an advanced phone with lidar like iPhones can get volume but yeah the hidden/inner mass is a problem plus the oil as mentioned
tsimionescu•1h ago
This is a bad take. If LLMs are supposed to work as general purpose assistants, as they are being sold as by both the companies making them and by the majority of AI believers, then it is very much a solvable problem. The LLM could give a high level estimate (a sandwich is not going to be 0 Cal, and it's not going to be 5000 Cal, so you can give some kind of range), and then ask for the type of information needed to make a more accurate estimate.
beached_whale•1h ago
From personal experience, one can get practically close guessing such that the error isn't going to be more significant compared to the errors in insulin to carb ratios/sensitivity factors/...

I am pretty good at this and the cheese sandwich example threw me, I would have estimated around 10-15g of carb for each slice. So the 28g is fairly consistent with that, not 40g. The only real way would be to weigh it and use the labeling. Another thing that often gets people is the labeling often has a serving size of say 2 slices and a weight that does not reflect the actual weight of 2 slices.

Luckily with good tools the significance is reduced, people using closed loop insulin pumps will automatically correct for that. Lots more room to wiggle.

bryanlarsen•1h ago
The question isn't about calories, it's about carbs. Drenching that sandwhich in olive oil won't change its carb count. From the picture it's a thin cheese sandwich -- we can see cheese and we can see it's thin enough that there's little else. Might be no butter, might be lots of butter, but that won't affect carb count. If there's lettuce in the sandwhich there's likely a negligble amount. Hand it to a knowledgeable human and you're going to get a very consistent carb reading -- 30g, the value of two slices of wonder bread.

It could be much different -- it could one of those breads with weird macros, or fake cheese, or it could be hollowed out and packed full of hidden vegetables. But a human is going to give you the answer for two slices of plain white bread.

Aurornis•1h ago
That’s exactly the point of this article.

Many of the comments here assume the authors are stupid and were surprised by the result, but the point of the article is to inform readers that AI carb counting apps don’t work. That’s why they did the study.

drrotmos•52m ago
It is and it isn't. If you ask a human how many calories (or carbs) are in that sandwich, they can give you a qualified guess based on how a sandwich like that is typically constructed. They may not know the calories for a slice of bread or a slice of cheese by heart, but if you give them a food database, they can look it up.

They absolutely won't be 100% correct (bread sizes e.g. are going to be an estimate), but unless it's a trick sandwich drenched in olive oil or with hollow cheese, they're probably going to be in the right ballpark.

I don't think it's outside the realm of possibility for an LLM to be in the right ballpark as well, but that doesn't seem to be where we're at now.

ozgung•19m ago
As a human, in the photo of that sandwich I see 4 slices of bread and 4 slices of cheese (distributed unevenly). I have no idea about the weight of the bread, flour type or its sugar content. I don't know the type of the cheese, dimensions of the slices or total amount of cheese inside the bread. I don't know if there is butter or anything else inside. I can guess the size of the plate as a size reference but I can't be sure. Human or AI, it's an ill-posed problem. There can be widely different estimates which can be equally plausible.
bcjdjsndon•14m ago
But why would the same llm give you wildly different answers EACH TIME you ask?
zdragnar•2m ago
Because that's how they work? They aren't knowledge machines, they are random generators.
monooso•1h ago
Tomorrow on HN, "water is wet."
bethekidyouwant•1h ago
I asked an AI to guess how much a picture of a rock weighed 500 times… But it does propose an interesting idea. Which is burn after labelling. (maybe it could be really good at this)
christkv•1h ago
LLMs going to llm.
sathish316•1h ago
Feel the AGI of next-word or next-number carbs prediction
feverzsj•1h ago
Bullshit machine can't even do bullshit job?
jan_Sate•1h ago
Oh. I read "crabs" and I was confused until I clicked into the article. Guess I need coffee.
fHr•1h ago
ASI/AGI reached kap
ori_b•1h ago
Slop
amazingamazing•1h ago
With mass information you could infer much more from pictures. With some sort of standard cube in the picture as well as taking a picture at an angle that emphasizes all three dimensions you could also better estimate the relative volume.

It’s tractable I think, but not from a pic alone.

jaccola•1h ago
Yes one could potentially increase accuracy greatly. One big problem would be occlusion.

There is already a solution to this that would be very hard to beat (and one can choose to use or not use an LLM to assist): prepare food yourself and use the information provided by the manufacturer.

amazingamazing•1h ago
If you consider time at all what you suggest is hardly a solution. It is the most accurate, but even 50% accuracy at orders of magnitude faster to calculate would be more useful for the main use case which is losing weight.

However for diabetes accuracy is likely preferred and I’m not sure any computer vision would be palatable.

voidUpdate•1h ago
> "The prompt was adapted from the one used in the iAPS open-source automated insulin delivery system — it’s a real production prompt, not a toy example."

This idea is seriously being implemented in a production app? And people are using that app to make health choices? Oh god...

jchw•1h ago
> 42.9 units of insulin from a single photo. That’s not a rounding error. That’s a potential fatality.

Shit like this is why you shouldn't involve AI output in your writing process. It's especially ironic in an article about LLMs being unreliable... but it's pointless when the pre-print seems just fine at least to my eyes.

nextlevelwizard•1h ago
I used LLMs to count calories, but not based on photos, I mean I also did that, but primarily I fed in my exact ingredients and then used weights to get calorie estimates.

Was it always correct? Certainly not. But it helped me lose 30kg of weight since keeping even some track of calories was so much easier with LLM than any app I had used before.

Also of course it didn’t matter if I was exactly on point since it wasn’t about any kind of medicine

edu•1h ago
Curious, why it was easier to use an LLM vs a non-AI app with a DB of foods?

Seems that in this case a traditional approach would be more precise and more environmentally efficient to get to the same results.

nextlevelwizard•1h ago
Any app I have used before has asked me to look up the foods and add them manually and usually there has been ads or subscriptions involved.

Much easier for me to take pictures of the packets while making the food, the weight the final bulk product and then when I eat just weight the plate and say “500g of casserole” and the LLM spits out the calories and keeps track of the daily consumption

tcoff91•1h ago
Are you giving the LLM the weights of the ingredients as you go? Sounds like a great system.
jerkstate•49m ago
Nice. I vibe coded a similar kind of system, you can dump a recipe into the chat window and it will use tool-calling to lookup macros for any foods it doesn't have in the DB and put them in, estimate raw -> cooked changes in nutrition and weight (if needed), estimate total weight of the cooked product, and macros per gram (e.g. writes a 100 gram serving to the db, you can scale it up and down and it scales the macros linearly). Similar to you I have used this app to alter my macro mix from high-fat to high-carb (for workout performance) and cut my sodium from ~4g/day to ~2.4g/day by interrogating the DB about what foods I should eat more and less of. Found some surprising wins in my habitual diet that were easy to change to hit my health targets, and looking up and logging these things by hand without LLM assistance would have been too tedious and time-consuming for me to continue to do it for as long as I have been (maybe 3 months now)

Curious, what model are you using? I have found Qwen Flash to be really great for this - tool calling works well, it's smart enough, and very cheap.

tcoff91•1h ago
The data entry is a pain in the ass with those apps when cooking food from scratch. It’s much much easier with LLMs and natural language and voice mode and pictures of a food scale and things like that.
engineer_22•1h ago
To me, someone without a full understanding of the AI systems, it seems like the problem is most strongly influenced by image classification. The next logical step in this research is to remove image classification from the loop, since it's a confounding factor.
dyauspitr•1h ago
What a dumb article. The picture of the sandwich is essentially just a picture of bread. You can’t see what’s inside. A human wouldn’t be able to tell you. These are essentially AI hit pieces.
nextlevelwizard•1h ago
And it can be made better easily. Take a picture of the nutrition label of the bread and cheese first and then feed in this picture and you should get way better results
lolc•1h ago
As a diabetic I have done this exact exercise: Look at photos and guess carbs. Two slices of bread is easy mode.

Why assume trick ingredients?

tsimionescu•1h ago
This is based on a real app that someone is selling to real people. It's not a hit against AI, but it is very much a legitimate hit against uses of LLMs for this purpose.

Also, if LLMs worked as they are often advertised, they should have easily been able to answer "there isn't enough information in this picture to give you an accurate estimate. Try taking a picture of the label, or at least of the inside of the sandwich, or list the ingredients used".

a-dub•1h ago
i've found that multiple queries with the same prompt that requests a short answer is an excellent way to gain a confidence style measure that actually works.
endymion-light•1h ago
There's an incredibly serious lack of education with how LLMs & carb-counting works. This entire article would be better suited to astrology.com than hackernews.

When I opened it up, I assumed the author would have at least attempted a calculation service, maybe even placed something like the size of the meal into an actual model, using the integration of pre-existing tools that are (slightly more) accurate. Hell - most food literally is required to have calorie information, and you can query open source data for others!

But the author just took pictures of food & expected a realistic response? Is this genuinely what amounts to a study in AI?

This is akin to the instagram reels that talk to chatGPT and ask it to time how long they're run is. Except those are treated as funny jokes rather than being turned into studies.

I'd like to see this study done using any kind of actual grounding knowledge, seeing what mistakes AI makes when attempting to query ground truth from picture analysis - there would at least be an interesting result methodology in that.

nextlevelwizard•1h ago
As someone who used to do this. OpenAI models refuse to look up calories unless you explicitly tell them to and even then it is a hit and miss even if you tell them exactly what the product is. Easiest way to get good calculation is to just take a photo of the nutrition label or feed that info in by hand.

Funny thing is 4o did look up calories but I guess it was too good for this world

the_duke•1h ago
I exclusively use thinking mode, which is slower but much more likely to double-check things with web search etc.
nextlevelwizard•1h ago
Maybe. I stopped using OpenAI a while ago. But taking pictures of the nutrition labels was good enough
swalsh•1h ago
It amazes me how much people try to build AI systems relying on nothing more than the models knowledge. I suspect a great deal of "failed" AI experiments we keep reading are people just not having any idea how to use AI at what its good at.
furyofantares•1h ago
From the text of the article I believe the author is implying there are apps doing exactly this, and so this is why it was studied that way.

Had the author written the article themselves rather than an LLM their motivation probably would have been clearer.

Brendinooo•1h ago
> there are apps doing exactly this

Yeah, for sure there are. And people will just ask ChatGPT as well.

The funny thing is that for people who are just trying to lose weight without managing any health issues precisely, this type of extreme variance doesn't really matter, because the mere act of consciously quantifying food consumption is, based on my experience counting calories, the single biggest factor in success with weight loss.

criley2•58m ago
I actually think "just asking ChatGPT" is fine, because A) the data in these apps is suspect at best and B) the data behind calories is also pretty suspect (but we all play along because we can adjust other variables to make it all "work" well enough).

Once or twice a year I spend a few weeks meticulously measuring ingredients/cooked foods and recording calories and on complex recipes apps are next to useless at getting accurate data. You're trying to input five or ten relevant ingredients, and then weighing your cooked outcome to try and divide the ingredients by proportion. Frankly it's a mess and most people aren't doing it for home cooked meals, and are getting very lossy outcomes (weighing cooked chicken and marking it as raw chicken, etc)

With reasoning and tool calling (combined with me meticulously weighing before and after), it's producing fine data for my purposes.

ozgung•43m ago
The author uses the prompts and method from an open-source app that connects to insulin pump, a medical device. I think AI food identification is an experimental feature in the app.

> The prompt was adapted from the one used in the iAPS open-source automated insulin delivery system — it’s a real production prompt, not a toy example.

https://github.com/Artificial-Pancreas/iAPS

I think these are the prompts in the app: https://github.com/Artificial-Pancreas/iAPS/tree/5eabe22e7e2...

throwaw12•1h ago
I feel like you didn't understand the goal of this study

> The DTN-UK stated earlier this year that generic LLMs must never be used as autonomous advisory calculators for insulin delivery. This data is the quantitative evidence base for that statement.

This study is to prove that you should not rely on LLMs

snapcaster•1h ago
But it's stupid. If i smack myself in the head with a hammer is that proof hammers shouldn't be relied on?
jmye•1h ago
Are there start-ups led by idiots suggesting that smacking yourself in the head with a hammer will help treat your diabetes?

If not, then perhaps there's a problem in your analogy.

fc417fc802•1h ago
If you smack yourself in the head with a hammer and it injures you that's evidence that smacking people in the head with hammers is bad and shouldn't be done, right?
jkestner•1h ago
Here we’re at the origin of the tool and get to watch how many people hit themselves in the head before we learn this collective wisdom.

There’s a gap between what the tool will allow you to tell it to do, and what it’s good at. The feedback mechanism to tell the difference is deficient compared to a hammer.

coldtea•59m ago
No, but it would be proof you didn't get the point of the paper.
fabian2k•1h ago
The paper itself is a lot clearer about the purpose. The blog post reads very clickbaity and doesn't really explain the context well.
Aurornis•1h ago
I disagree, it clearly explains that AI carb counting apps are a problem and shouldn’t be used.

They’re writing in a neutral way that reaches their audience without lecturing or being condescending. They lead the reader to the conclusion rather than shoving it at them. I think that’s why it’s triggering so many angry comments on HN, but it’s effective for the audience they’re writing for (non technical people who may need convincing but don’t like being preached at)

The_Blade•39m ago
that is good to know. presented this way i find LLM behavior to be a feature, not a bug. then again i think everything is value add over pen and paper / notepad / spreadsheet and maybe a friend or doctor (or specialized equipment if you need more than calorie in, calorie out). just go exercise and don't be a lard lad
zipy124•1h ago
Honestly it's scary how misunderstood this is by the general public, the media and EVEN scientists.

There is a shocking amount of Computer Vision tasks where the scientists claim you can get X info from a picture of Y and it's like, even with ML/AI you can't extract data where there isn't any. The fact I can add an arbritrary amount of high-calorie fat to a meal without changing the appearance by defintion shows it's pointless. A 1000 calorie and 100 calorie milkshake can look identical, and you'd have no way of working that out via an image even if it was a super-intelligent system.

Similarly I see it in things like extracting material of an object from an image of it in serious research papers, which for the same reason cannot be done, since how an object looks has very little to do with what its made of, else painting and other art would clearly be impossible. The information is just not there within the data.

mortenjorck•1h ago
It’s like CSI “enhance!” AI image upscaling. People will do it, see it fabricated details, and then draw the wrong lesson from it, that “AI fabricates things!” when that is exactly what they asked the model to do and there is no magic math that would extract ground truth that was never in the image to begin with.
InsideOutSanta•1h ago
There are apps in the app store right now that pretend to do this kind of thing, so having somebody actually show that it doesn't work is valuable, even if we already knew the outcome ahead of time.
endymion-light•1h ago
I suppose i'd much rather a study analyse the apps in the app store that are attempting and claiming to do that kind of thing - rather than the base model they might be using.
giancarlostoro•1h ago
> But the author just took pictures of food & expected a realistic response? Is this genuinely what amounts to a study in AI?

Reminds me of that one youtube video (I forget who it is so I have no idea how to pull it up) where he turns on the camera on his phone for ChatGPT and asks it what everything it sees weighs, then puts it on a scale, and ChatGPT was never right, ever, which makes sense, I couldnt tell you what most things weigh on sight alone either, but ChatGPT often got it dramatically off. I got the feeling he thought it was terrible AI for this, but I don't think a model looking at an image of something and trying to guess its weight / calories / etc... is a reason to call an AI model bad...

wat10000•37m ago
People do not understand this stuff at all. So many times I've seen people post the output from one of these services with full confidence that it has to be correct because it came from a computer.
Izkata•17m ago
Between the marketing and the hype, plenty of people believe we already achieved true sci-fi-style superhuman general AI a year or two ago.
Aurornis•1h ago
> But the author just took pictures of food & expected a realistic response? Is this genuinely what amounts to a study in AI?

The article explains this: There are apps targeting people with diabetes that claim to count your carbs with AI.

> If you’re using AI carb counting in a diabetes app

Before you dismiss a study, try to understand where it’s coming from.

The authors of the study weren’t stupid. They knew the LLMs would provide poor results. They ran the study to quantify it and create a resource to spread the information in response to the rise of AI carb counting apps.

ilivethere•1h ago
Typical case of the "curse of knowledge". We deal with AI on a daily basis on the technical level, so it's very easy to forget that the "common" folk really still believe that AI can replace dieticians, gym coaches, etc
endymion-light•1h ago
I don't believe the authors of this study are stupid.

If there are apps targeting people with diabetes that claims to count your carbs with AI, why haven't those been analysed? That would be a far more effective claim.

I based the study off of the clickbait article that they wrote about the study - i'll read through the study to see whether they analyse that, but it would be far more effective to see if the 'carb-counting' AI app is returning similiar results to the frontier model - that's an interesting result that actually can forward discussion.

Aurornis•58m ago
> If there are apps targeting people with diabetes that claims to count your carbs with AI, why haven't those been analysed? That would be a far more effective claim.

Because the apps aren’t going to let you submit 29,000 automated requests for statistical analysis.

And if you did, the authors of those apps would just release an update saying they changed models and try to dismiss the study.

The vitriol against this article on HN is sad. Commenters who agree with the article and its conclusions are grasping for reasons to be angry about it anyway

endymion-light•46m ago
You can commit statistical analysis on frontier models and still use commercial applications as an identifier & comparison.

Criticism is not vitriol - it's possible to make a wider point about being taken aback by the lack of education within AI to the point that there's a critical mass of people using them for calorie counting; but there are many studies on effects of LLMs on psychology etc that are far more effective.

But for me - this is like creating a study that performing algebra & calculus is innacurate on LLMs. That should be common knowledge

hrimfaxi•32m ago
It is not uncommon to study things that are considered common knowledge.
ilivethere•1h ago
> But the author just took pictures of food & expected a realistic response?

Outside our tech-enabled bubble, there are folks who have been sold the idea that ChatGPT et al is a miracle worker capable of replacing dieticians, gym coaches, psychologists, etc.

So it's VERY plausible to believe that there are folks out there snapping pics of their meals and asking GPT to spit out nutritional values.

endymion-light•54m ago
That's a good point - and I think there's a wider core lack of knowledge outside of the bubble.

I suppose I just expected this study to be a little less 'water is wet' which made me dissapointed, but that may be coming at it from a more technical perspective.

kalleboo•1h ago
> But the author just took pictures of food & expected a realistic response?

There are very popular apps on the App Store right now that are going viral among non-techie people that do exactly this, and they have no concept of how AI works. My wife was talking about one and I had to give her a reality check that the AI had no idea what ingredients were used to make the food. And she's a licensed nutritionalist.

Studies like this create something to point at for people who are confused and serve as a springboard for a conversation in the media.

endymion-light•44m ago
That's true - I suppose i'm just dissapointed that this study hasn't seemed to include those within any analysis. Being able to point out that the top 100 calorie counting apps on the app store return similiar results to simple frontier models would be of interest.

I think i'm just dissapointed that this study doesn't go deep enough, and stays at a surface level statistical analysis of frontier models.

coldtea•59m ago
>But the author just took pictures of food & expected a realistic response? Is this genuinely what amounts to a study in AI?

If there are commercial services where you take pictures of food and are promised a realistic (paid for) response, then yes. And there are.

endymion-light•52m ago
But I don't see them using those commercial services in this study - instead, they're using frontier model companies? Is Gemini advertising that you get a realistic calorie count from a picture? Maybe so - in which case i'd take it back!
coldtea•44m ago
Are commercial services anything more than just UI facades on top of frontier model APIs?
endymion-light•40m ago
Great point - and i'd love a study to address that. If the study pointed out that X services sit perfectly within the analysis found, I think that would be a fantastic study that would be enlightening & useful to show.
swiftcoder•17m ago
The app the study is based on is open-source, so you yourself can verify that it does indeed just call a frontier model with the same prompts used in the study
notahacker•35m ago
The commercial services likely also have frontier model dependencies...

The opening to the actual paper is quite explicit that (i) other studies have already tested commercial apps with with unimpressive results and (ii) a popular open source app for carb counting directly relies on API calls from these frontier models, and this research batch tested the images used the exact same models and prompts as the popular open source app.

dahart•39m ago
And what’s the variance & accuracy of their responses? Isn’t comparing the models’ variance to baseline human variance what matters here? It seems like they didn’t do that, and I agree with parent’s call for that kind of baseline.

Having counted calories for years, I don’t think I could reliably estimate the calories or carbs in the example picture of a cheese sandwich. I can make assumptions about the bread and the cheese, but I might easily be off by 2-3x. Calorie counting apps that use text descriptions also have huge variance for the same thing. The problem might be the belief that a picture or description is enough, regardless of who or what is guessing…?

Edit: Ah, I see from sibling thread you meant commercial services are LLMs, I thought you meant there were human-backed services to compare to. Anyway, I totally agree there’s a problem if people rely on AI for safety, but I’m not sure LLMs are the core issue here, it seems like using vague information and guessing is the core issue.

swiftcoder•16m ago
> Isn’t comparing the models’ variance to baseline human variance what matters here?

You seem to be missing the context that this isn't just about diet apps - this is about apps claiming to be able to track carbs sufficiently accurately to be used in a medical context to dose insulin (a substance which can be lethal if incorrectly dosed)

macleginn•57m ago
It doesn't really matter if the model cannot make a good educated guess about calories in the food if it cannot give a consistent response given the same input.
something765478•57m ago
> The prompt I used asks each model to return a confidence score (0 to 1) for every food item it identifies. All four models dutifully returned confidence scores for 100% of items. Surely we can use those to filter out bad estimates?

This is a problem with the companies selling the AI models, not the customers. It is their responsibility to inform consumers about the limits of their services, and to train the models to say "I don't know, there is not enough information".

larodi•54m ago
> This entire article would be better suited to astrology.com than hackernews.

I laughed, but you nailed it. Sadly so many people lack even basic understanding of LLMs and the ViT tower that makes it vLLM, that I expect a whole industry, similar to fortune telling, to emerge out of it.

jmyeet•44m ago
> But the author just took pictures of food & expected a realistic response?

If someone sent me a picture of a meal and asked me what the macros were or how many carbs this is, I would say "I can't tell from a photo. Nobody can". The problem is that current LLM chatbots don't seem to have a concept of telling you "I don't know", "you can't do that" or even "you're wrong".

You can say that somebody shouldn't trust an LLM for this but it's going to be a problem that LLMs give nonsencial answers. What I find particularly amusing is that there are still technical people (generally, not anyone specifically) who seem unable to acknowledge that LLMs hallucinate and lie.

There was a post on here recently that I couldn't find with some quick searching but the premise basically was that chatbots were trained like neurotypical people: A lot of affirmation and basically lying. Separately someone else characterized this NT style of communication as "tone poems" [1]. I keep thinking about that because to me that's so accurate.

Dunning-Kruger is a common refrain on HN, for good reason. Another way to put this is how often people are confidently wrong. I really wonder if this is an inevitable consequence of NT communication because most neurodivergent ("ND") people I know are incredibly intentional in what they say and mean.

[1]: https://news.ycombinator.com/item?id=47832952

layer8•40m ago
The author is doing what a non-sophisticated user would be doing, or would want to be able to do, and estimating calories based on a photo has been an often-cited potential or promised AI use case in recent years years. It makes a lot of sense to test current general-purpose AI’s performance on it as a reality check.

It also exemplifies how current AI offerings are still quite limited in their capabilities, because one would expect that they’d do the intelligent thing on their own that you had expected, instead of the user having to come up with a working methodology.

jvanderbot•33m ago
I did this too! For months (almost a year) I used descriptions, pictures, and measurements of food to get rough calorie counts. My diet is pretty simple and repetitive.

I would occasionally check the estimates, maybe once every few days for meals I wasn't already pretty sure of, and it was generally accurate. Where it was extremely inaccurate was on portions, and anyone who has dealt with computer vision could tell you, you can't get scale from a picture. So I'd have to weigh some meals or ingredients, which would generally make things more accurate again.

So, I think it's possible, but you need multimodal data and grounded with regular checks.

thechao•27m ago
About once a week I ask ChatGPT to give me a reasonable diet for recomp with weight loss. It consistently insisted I have at least 7 meals consisting of at least 30g of protein per meal, but the protein source can't be whey or casein. When I ask "why" it cites a bunch of studies ... but most of those "studies" are N=1 of a college or Olympic level athlete. If, instead, I grab a large scale lateral analysis, it says "3 meals" with about 1/2 of the protein.

It'll defend both sides (mutually contradictory) to the death. NOTHING will budge it from its initial stance.

ifwinterco•24m ago
To be fair this is a reflection of the general state of nutritional science and the actual answer seems to be "it depends on your genes".

Some people do well on 6 small meals, others do well on no breakfast and two large ones. Studies can't tell you anything useful about that, you have to experiment and find out what works best for you

black6•27m ago
> There's an incredibly serious lack of education with how LLMs & carb-counting works

The public's education comes from the incessant marketing from AI companies that their models are the panacea for everything.

andrewvc•26m ago
One of the biggest gaps is that people don't understand that food labels are allowed by the FDA to be off by up to 20% in terms of the number of actual calories!

In the real world you need to calibrate your behavior with the results. Are you gaining weight? You'll need to eat less if you want to lose any. You can do all the math with nutrition labels and macros you want but that's all theoretical.

See this study below for the 20% figure, as well as their experimental results on real food items (some even exceeded this threshold though most were within it). https://pmc.ncbi.nlm.nih.gov/articles/PMC3605747/?st_source=...

bonoboTP•20m ago
A large part of the effectiveness in counting calories is that you pay more attention and make more conscious decisions and are less likely to "cheat" if you have to enter it in your food log.

It's indeed like astrology. Simply thinking about personality traits and thinking through your life and your desires and goals and current situation is already beneficial to take charge and navigate your life.

winddude•20m ago
as a t-1 diabetic, this is exactly what we do for nearly every meal we eat, especially in restaurants, look at it and try to estimate the number of carbs.
datsci_est_2015•18m ago
The obvious meme to invoke here is:

  - AI will solve all of our problems 
  - No not like that!
Are the trillion dollars sloshing around the AI economy well-invested if the refrain is always “you’re holding it wrong”?

So we’re trying to define, through trial and error, what problems “AI” will actually solve, and this paper is one of the many cobblestones on that road.

endymion-light•3m ago
i mean it's more like

"AI can solve this one problem, but it needs X, Y, Z, because it's not a omnipotent god entity"

"I tried it without any of those things and it didn't work - this is worthless tech!"

I don't know if more accurate calorie counting using AI exists - but it's like being upset that the screwdriver isn't gluing wood. AI is far more than frontier LLMs.

chromacity•3m ago
> There's an incredibly serious lack of education with how LLMs & carb-counting works

Oh! Do the vendors offer trainings to make sure the users understand how LLMs work? If not, surely, the LLM itself is trained to know its limitations and politely decline in situations like that?...

The #1 use case for this tech is "here's a problem I don't feel like solving, let's have a computer do magic". It's how it's advertised on TV, it's how it promoted in the software I already use. Food preparation! Travel planning! Shopping! Tutoring your children! You can do anything now!

I just talked to a realtor who will make a killing on a real estate transaction. Instead of offering human insights, they sent me "AI reviews" of several properties. The AI has never been to any of these properties and has no idea how they actually look like. But I guess it's how we operate now as a society.

If you go to eBay, every other listing description for used items is AI-generated. The AI doesn't know the condition of the item or what's included or missing. Doesn't matter, it's magic. It's AGI, it will figure it out.

Most of the uses of AI I encounter as a consumer are like that, and the companies selling this tech are 100% complicit.

mottiden•1h ago
I am surprised that people believe that calories can be counted correctly from a single photo
edu•1h ago
Issue is there are many apps claiming they can do that, and for many people are “magic”.

We should not allow companies to lie blatantly to the customers.

Edit: r/blame/lie/

tcoff91•1h ago
These calorie counting picture apps should be sued for false advertising.
boelboel•1h ago
It's like the 'enhance' bs they do in crime shows. All of a sudden the computer can make up a sharp image out of nowhere
a7fort•1h ago
Finally we have a simple way to get machines to generate a truly random number
Marciplan•1h ago
skill issue
recursivedoubts•1h ago
> You’d expect the same answer each time. It’s the same photo, the same model, the same question. But you won’t get the same answer. Not even close — and the differences are large enough to cause a hypoglycaemic emergency.

No you wouldn't, not if you have a basic understanding of how LLMs work and what "temperature" is. They are stochastic algorithms picking the next token based on a highly structured (and often very useful) coin flip.

sluck•51m ago
just came here to read this thanks faith in discussions restored
harperlee•1h ago
There is a lot of hate in the comments but there is some merit to the post existing:

  1. Even if the task is unreasonable, it is good to showcase that the LLM will perform poorly - warning not to be used for diabetes.

  2. As it is a probabilistic model, the approach was to execute it multiple times and look at the distribution. They also tried to minimize variance: "All at the lowest randomness setting these models offer.", the post mentions. Yet the variance of the responses is surprising.

  3. A multimodal LLM should be in general able to discriminate between crema catalana and a cheese sandwich, and provide a textual, uncalculated range of how much calories the item has (internet is full with tables for calorie counting and things such as this https://fitia.app/calories-nutritional-information/cheese-sandwich-1205647).

  4. It is not clear that the "expose" surprised / outraged style is just a communication vehicle or if the author really thought that e.g. LLMs could be hypothetically able to provide confidence estimates.
bcjdjsndon•15m ago
Re: 2... I think it's interesting they add arbitrary randomness in the algorithm. The problem of wildly varying outputs to the same input wouldn't exist in the first place
fabian2k•1h ago
It does sound like a pretty terrible idea to try to count carbohydrates from an image. There just isn't enough information there to reliably do that. At best you could identify the object in the image and then show reference information on typical nutrition values. But if you need anything more accurate than that, you probably have to read the labels on the ingredients and calculate.
FrustratedMonky•1h ago
Is this about AI?

1. If I feed the exact same image in, it does not deterministically give me the exact same result every time.

2. Or is this about calories, because even if a package label says "200 Calories", if you were to measure every package, each one would all be different. 198,199,200,201,202. Plus/Minus a pretty big range.

>>> answered own question. " It’s the same photo, the same model, the same question. But you won’t get the same answer"

algoth1•1h ago
I’ll save you a click: ‘Llms can’t perform direct calorimetry through a photo of a meal. Llms can’t even perform basic atomic spectroscopy’ in other news…
Waterluvian•1h ago
It's funny how with AI this comic is basically reversed: https://xkcd.com/1425/
embedding-shape•1h ago
> You’d expect the same answer each time. It’s the same photo, the same model, the same question. But you won’t get the same answer. Not even close — and the differences are large enough to cause a hypoglycaemic emergency.

Already the first paragraph highlights the issue; unless you set temperature=0.0 and the model can actually do reproducible inference, none of the "answers" you get are deterministic!

But it's a very common misconception that "same question gets same answer" would be true, when it's almost by accident you get the same answer for the same question. The part that people expect this, is the problem, as most platforms are not built to provide that experience. Of course you'd get different responses, it's on purpose!

monegator•1h ago
This is one of the reasons i never used LLMs for anything related to coding. And i never intend to do. If i tell the thing to generate, will it generate the same thing, every time? will it change stuff that is working because the random number generator will conjure a slightly different answer?

i'd be ok with it if i was generating a picture of X, or some word salad about Y, but not for code. Never for code.

embedding-shape•1h ago
You'll learn to work around it, just like ML practitioners got used to imprecise math in regards to floats. But that LLMs are using imprecise math and doesn't have 100% reproducible output doesn't make them impossible to work with, just a bit harder.

But, if what you're doing right now works for you, do continue as-is if you so wish, I have no stake in if people use LLMs or not, just hope people make choices based on good information :)

Aurornis•1h ago
This will surprise nobody here, but it’s important to communicate to audiences that are new to LLMs.

This is targeted at people with diabetes because there are AI carb counting apps appearing in app stores

> If you’re using AI carb counting in a diabetes app

These apps are probably not even using the mainstream models used in the study because they would be too expensive for cheap or free apps, and they’re probably forcing structured output to get a response without any of the warnings that an LLM might include if you ask it directly.

sarusso•1h ago
For context: a LOT of people, maybe naively, are now using AI to help them count carbs, and some of these features are already in beta, if not shipping.

That is why I believe this piece from Tim is remarkable: it shows the limitations in a language the diabetes community can understand, and this is why I posted it.

NiloCK•1h ago
I think the headline oversells this a little?

The reported variance in Sonnet 4.6's estimates here are actually quite low, and in general terms, not so bad across models. Damn paella.

This does seem like a task well suited to a for-purpose training run against a bunch of labelled data. Is there any reason they wouldn't improve at it?

axlee•1h ago
"Crema catalana: Three of four models called it “creme brulee” 100% of the time. Only Gemini 3.1 Pro got “crema catalana” — in 3.4% of queries."

----

Wikipedia for Crema catalana:

Crema catalana (Catalan for 'Catalan cream'), or crema cremada ('burnt cream'), is a Catalan dessert consisting of a custard topped with a layer of caramelized sugar.[1] It is "virtually identical"[2] to the French crème brûlée. It is made from milk, egg yolks, and sugar. Crema catalana and crème brûlée are made in the same way.

---

Oh no, my AI can't detect that an obscure clone of a famous dish is indeed the obscure clone, and not the commonly know version.

tdeck•1h ago
In high school my Spanish teacher told us that Crema Catalana was the Spanish name for Creme Brulee.
emadda•1h ago
Related: I created an app to track the molecules in your foods:

https://kg.enzom.dev/

You specify your foods in grams with plaintext (no pictures).

I never liked the "take a picture to measure calories" approach, as you could have 10 table spoons of olive oil which would drastically change the calories but would not show in a picture.

jerkstate•30m ago
This is really cool. I vibe coded almost exactly the same app, mine also tracks saturated fat, cholesterol, sodium, and fiber (I'm getting older so these macros are pretty important to me). One of the really cool things you can do if you have tool calling hooked up is to have the LLM analyze your diet and tell you what you can do better to hit your targets - swap pizza for pasta, decrease the amount of cheese you put on your sandwich, if you're gonna have fast food don't get the fries and eat low fat/low sodium the rest of the day, etc. What model are you using? I have found Qwen Flash to be really good for my app - smart enough, tool calling works really well, and very cheap.
827a•1h ago
To be fair, if you ask 10 people to eat visually identical food 10 times each, then magically measure the calories consumed by each individual, you'd probably get ~70 different values. The internal density of food is extremely difficult to reason about from the outside. The personal variance is also difficult to reason about.
ozbonus•1h ago
Before the next galaxy brain shows us all how smart and witty they are by adding the nth sarcastic comment about how obvious this result is, I hope they'll take a moment to consider a few things.

Yes, people are using LLMs for this kid of thing. Lots of people. All the time. I've met plenty of them and there loads of apps that offer this kind of "service". The authors are well aware that people are doing this and probably anticipated the result.

Why do the study at all? Because it's important to demonstrate and measure things, even obvious ones. Because it's not obvious to everyone, like the people who are already consulting LLMs for dietary information to manage their health. Because it's easier to enact official policies when there's hard evidence.

jasonkester•1h ago
LLMs seem really bad with reading numbers and reporting them back. I’m building a game, and to se how well its docs were being indexed, I tried asking simple questions to ChatGPT, Gemini, whatever Microsoft’s thing is, etc:

“What is the armour value for the Leather Shirt” in the game Stravaeger?”

It confidently got it wrong.

“You can find the game at https://stravaeger.com”

Different confident answers, also wrong.

“You’ll find it in a table on this page: https://stravaeger.com/docs.html?inventory_item=LEATHER_SHIR...“

Oh, sorry. I was inferring from other similar games. Here is a different confidently wrong number.

“It’s also in the .json file linked on that page”

And another wrong value. Random numbers should have got it right by now, but no. And the confident, authoritative tone never changed. Every model I tried was the same story.

Ekaros•1h ago
Also makes one question about task that we think AI can do. If the variance produced output is that large. What does it tells of failure rate in other tasks? Or reliability in general for uses cases?

In real world the acceptable failure rates in many cases are lot lower than we now accept. One in thousand could be too high if you process say thousand times. So in reality good enough error rate should be in one in million or lot rarer...

NiloCK•1h ago
Another more general comment:

There general interest across a variety of disciplines to kick the tires of LLMs with respect to their competence in DOMAIN_X. This is good in general terms, but, especially with larger studies, they tend to be out-of-date by the time of publication, and super out-of-date by the time they hit the media circuit. Out-of-date here in terms of testing against models 1 or 2 or more generations back from SOTA.

The DOMAIN_X experts do have a lot to offer in terms of defining success criteria across domain tasks, but the studies (snapshots in time) could be much more impactful if they were instead packaged as benchmarks (that could track model progress over time, and even steer it).

AI community / industry could probably do some outreach work to streamline or standardize methods for general researchers to produce reusable benchmarks.

gyosko•1h ago
I always love AI discussion. Using AI like they fucking sell it to us? You're doing it wrong!!LLMs can't do that!!

No shit sherlock, but the AI gurus are just telling people that this fucking parrot CAN DO EVERY FUCKING THING.

Why wouldn't an ordinary guy just ask these question to an AI when everybody is telling him that AI is intelligent enough to answer accurately?

philipphutterer•1h ago
I agree to others that the intent of this study could be written more expressively, but honestly, doesn't this show exactly one thing to the people in the tech world? We need better education and communication for people without technical knowledge about what to use which AI models for and what NOT to do with them. For me, quite often I try to give quick help and information on what to expect from an LLM for given input whenever someone non-tech close to me is running into unexpected output. AI just seems so simple and non-complex to most people, it's shocking.
larodi•56m ago
Time to ask it 20k times which is more harmful - alcohol or weed. Curiously in my attempts alcohol always tops the harm ratings miles before all else, including some class 1 drugs.
arjie•46m ago
This is pretty interesting. Not the content, but the technique. I suspect this was an entirely automated pipeline with Claude Code or Codex and that the author then just unleashed one of the commercial harnesses on the entire flow of querying the APIs and writing the post, including the headline. We've clearly reached the point in AI writing where a small set of inputs can create content that humans enjoy participating in discussion of. Good show.
mbesto•41m ago
probabilistic != deterministic
raymondgh•41m ago
To the defense of the models, the experiment was run with temperature set at 0.01 which is very low; setting this can lead to weird responses. My find-on-page also found no mention of “thinking” or “reasoning” in the paper. Not trying to discount the whole thing but very curious how changing the parameters might affect results
juancn•35m ago
Does this surprise anyone?

I mean these models are inherently probabilistic.

If you run enough samples you'll get results matching the learned probability distribution, the more you sample the higher the chances that you'll land on an unlikely response.

tim-tday•28m ago
LLMS can’t count. This is well known. Give them a calculator or allow them to write code to do it.
cj•27m ago
The mistake the article makes is providing a photo with zero context. That's why it's mistaking a cheese sandwich for creme brulee. You'll get much more consistent responses if you share a text description along with a picture.

I use AI to estimate calories / macros multiple times per week. I always ask both ChatGPT and Gemini, and then I use my brain to decide what I actually want to log in my calorie tracking app.

About 80% of the time, ChatGPT and Gemini give estimates that are very close to one another.

techcode•21m ago
I've seen/noticed this simply from being on a low carb (aka KETO) diet.

Besides AI grossly over/under estimating values even when you give it a photo of the packaging with nutritional table and tell it weight you used.

The other thing that surprised me, at least until I read up on how LLMs are actually working. Was how it would confidently BS you for your daily total.

Even when the chat/messages are just "Ate ABC with XYZ values, what's my daily total?"

While I guess new chat for each day, or some MCP for storing and retrieval of record/meals would've helped with those daily totals.

The total would still be wrong - unless you explicitly specified each of the values you need to track (e.g. carbs, fat, protein, kcal) to be put into records.

At which point of course - you're not really using AI/LLM but basically an CRUD application.

umvi•12m ago
Food companies try every trick to make carb counting difficult. Companies will tout "zero sugar" in the label even though the first ingredient is maltodextrin or maltitol or some other thing that quickly turns into sugar the moment you ingest it. The only way to get good at it is to wear a CGM and then see how your body reacts to things and then keep a mental list after that. A company may claim some product only has 2 net carbs, but I've found those claims to be false a lot of the time, with bigger companies being the biggest offenders.
nvahalik•11m ago
Man. I built an AI food system at my previous company and it was tough: we ended up just using it as a way to look up foods in a real DB and allowed guestimation but ultimately the win was "I don't have to search for everything on this place" we surface _what_ and then allowed the user to enter the real weights.

And this... really was and (will be) the only way for this to ever work.

mattnewport•9m ago
Ironic that they used an LLM to write the article:

> 42.9 units of insulin from a single photo. That’s not a rounding error. That’s a potential fatality.

newshackr•9m ago
Maybe not great for the intended use case but guessing 28g of carbs for a 40g sandwich seems pretty close to me, particularly without knowing the dimensions of the bread etc