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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

I tried 2 chats and it declined both.

- 1st chat asked about a minor shoulder injury most likely mechanisms

- 2nd chat asked about optimal bloodwork testing markers

it seems to dislike biological chats. Rejected me on a chat that I am running with 4.8 as well on a rare condition I have.
So the degradation to Opus 4.8 from the article isn't happening in practice?
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)

It is, it asks you if you want to continue as opus 4.8… but I was trying precisely to evaluate fable
Maybe that's only in the chat UI, and not the API?
Oh joy. A model whose safeguards make it prone towards code that make your systems less safe. How brilliant!