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Claude 4 System Card

simonwillison.net

91–100 of 264 posts

Re: Claude 4 System Card

#91

> Please implement for me. Please write a high quality, general purpose solution. If the task is unreasonable or infeasible, or if any of the tests are incorrect, please tell me. Do not hard code any test cases. Please tell me if the problem is unreasonable instead of hard coding test cases! I have pretty good success with just telling agents "don't cheat"

ane dotes that rely on the speakers intelligence to detect cheating in a LLM are confusing.

Re: Claude 4 System Card

#95
post #29

Obviously this should not be taken as a representative case and I will caveat that the problem was not trivial ... basically dealing with a race condition I was stuck with for the past 2 days. The TLDR is that all models failed to pinpoint and solve the problem including Claude 4. The file that I was working with was not even that big (433 lines of code). I managed to solve the problem myself. This should be taken as…

Opus or Sonnet? Also, did you throw this to Gemini 2.5 as well? Just curious.

Re: Claude 4 System Card

#96
post #3

Earlier quoted context omitted.

They gave a bullet point in that intro which I disagree with: "The only way to make GenAI applications secure is through vulnerability scanning and guardrail protections." I still don't see guardrails and scanning as effective ways to prevent malicious attackers. They can't get to 100% effective, at which point a sufficiently motivated attacker is going to find a way through. I'm hoping someone implements a version o…

I only half understand CaMeL. Couldn't the prompt injection just happen at the stage where the P-LLM devises the plan for the other LLM such that it creates a different, malicious plan? Or is it more about the user then having to confirm/verify certain actions and what is essentially a "permission system" for what the LLM can do? My immediate thought is that that may be circumvented in a way where the user unknowingl…

The idea is that the P-LLM is never exposed to interested data.

Re: Claude 4 System Card

#97
post #51

After Google io they had to come up with something even if it is underwhelming

Exactly. It's getting to the point where the quality of the top AI labs are either not ground-breaking (except Google Gemini Diffusion) and labs are rushing to announce their underwhelming models. Llama as an example. Now in the next 6 months, you'll see all the AI labs moving to diffusion models and keep boasting around their speed. People seem to forget that Google Deepmind can do more than just "LLMs".

Google's output this IO was really impressive. The diffusion LLM but especially veo3 was something else.

Re: Claude 4 System Card

#98
post #5

Given the cited stats here and elsewhere as well as in everyday experience, does anyone else feel that this model isn’t significantly different, at least to justify the full version increment? The one statistic mentioned in this overview where they observed a 67% drop seems like it could easily be reduced simply by editing 3.7’s system prompt. What are folks’ theories on the version increment? Is the architecture sig…

My experience so far with Opus 4 is that it's very good. Based on a few days of using it for real work, I think it's better than Sonnet 3.5 or 3.7, which had been my daily drivers prior to Gemini 2.5 Pro switching me over just 3 weeks ago. It has solved some things that eluded Gemini 2.5 Pro.

Right now I'm swapping between Gemini and Opus depending on the task. Gemini's 1M token context window is really unbeatable.

But the quality of what Opus 4 produces is really good.

edit: forgot to mention that this is all for Rust based work on InfluxDB 3, a fairly large and complex codebase. YMMV

Re: Claude 4 System Card

#99
post #75

Earlier quoted context omitted.

I'm noticing much more flattery ("Wow! That's so smart!") and I don't like it

Agreed. It was immediately obvious comparing answers to a few prompts between 3.7 and 4, and it sabotages any of its output. If you're being answered "You absolutely nailed it!" and the likes to everything, regardless of their merit and after telling it not to do that , you simply cannot rely on its "judgement" for anything of value. It may pass the "literal shit on a stick" test, but it's closer to the average ChatG…

I hope we get enterprise models at some point that don't do this dumb (but necessary) consumer coddling bs.

Re: Claude 4 System Card

#100

Earlier quoted context omitted.

Perhaps they want to include online discussions/commentaries about their paper in the training data without including the paper itself

Most online discussion doesn't contain the entire text. You can pick almost any sentence from such a document and it'll be completely unique on the internet. I was thinking it might be related to the difficulty of building a search engine over the huge training sets, but if you don't care about scaling or query performance it shouldn't be too hard to set one up internally that's good enough for the job. Even sharded…

Why use a search engine when you can use an LLM? ;)
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