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Claude Opus 5

anthropic.com

81–90 of 1001 posts

Re: Claude Opus 5

#81

Isn’t it just hilarious that a model that seemed so superior to Fable but didn't get doomsay marketing from Anthropic got released without any issues? In theory, this was supposed to be AGI level according to Anthropic, yet here we are, just a normal Friday.

Fable established the frontier, this is just catching up.

Re: Claude Opus 5

#82
The wording in this post seems much more... restrained? than usual. Maybe Anthropic is afraid of exaggerating the capabilities and consequences of their new models to avoid government scrutiny and sanctions.

> we’ve intentionally avoided training Opus 5 on cyber tasks [...] it remains substantially behind Mythos 5 on the exploitation of those vulnerabilities

I wonder if Anthropic would still intentionally nerf their models without the threat of government intervention.

Re: Claude Opus 5

#83
The benchmark table is manipulative, borderline lying through statistics. In every line the top performing cell is marked red. Except the line where Sol leads, there it is marked in gray.

Re: Claude Opus 5

#85
post #48

> Opus 5’s safeguards match those of Claude Fable 5’s, with one change: it now permits source-code vulnerability discovery at all access levels. This means that the model can support defensive cybersecurity work while still blocking vulnerability discovery in compiled binaries, which is more commonly used offensively Why can't they also allow Fable to do so also? Why is source-code vulnerability discovery limited to…

Because their model previously got blocked by the government for this and they don't want a repeat?

5.6-Sol is a lot more permissive than Opus/Fable even w/ CVP (once you sign your soul away to Palantir via Persona, anyway), while maintaining better capabilities

Re: Claude Opus 5

#86
post #42

How does it perform on HuggingFaceExploit bench? Suspiciously absent, so not sure if I can take the model seriously. On a serious note, I hope they improved their extremely sabotaging and unspecific bio safeguards, which prevented Fable from being used in any codebase that ever so slightly grazed medical terminology or data and made me switch to 5.6 Sol.

My codebase had a dataset with a bunch of SMILES strings and the word Malaria. Fable did not want to touch that codebase

Re: Claude Opus 5

#89
post #26
post #23

Great that there's a new model but they could fix their existing infra. We're considering dropping our Claude Team sub cause it's unusable recently. Constant bugs, dropped sessions, issues switching models, http errors. It's becoming ridiculous

Funny that a company selling an AI software developer can't use it to fix their infra. Fixing those issues still requires humans.

How many companies at the size of Anthropic can serve the amount of traffic and manage the amount of compute they have?

Re: Claude Opus 5

#90
post #40

I am very confused about what the difference between Opus 5 and Fable 5 is now. What is the purpose of having two models that are so similar? The main differences I see are cost and marginal capability, according to the Anthropic-provided benchmarks.

I guess character? Fable is more friendly and curious while opus is a bit more deliberate and conservative.
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