I noticed the same, and posted about it three days ago.
Opus is suddenly fumbling basic tool calls and failing to finish tasks even at high, where I had been permanently using it on low effort with success since it came out. It is very frustrating.
My guess is they quantized it and/or reallocated DC capacity to train a new model, this has happened before.
Multiple instances of failing a Bash tool, calling bash (lowercase) and getting rejected and even reprimanded by the API "No such tool, call Bash instead".
Killing it's own shell, multiple, multiple times in the same session. I'm sure I saw a phrase "I did it again".
It's so shit that it must be damage control. The alternative is to limit usage and that'd affect the IPO even more.
I noticed its been trying to drag out the conversation on every topic. Maxxing token consumption for the dollars instead of staying on point. Makes sense for them but its frustrating for me as a user. I suspect this is going to be the AI version of enshittification. Now its only missing some badly needed in-stream ads.
> It is very frustrating.
Not just frustrating, it can also be dangerous. What if you trust Claude with certain security-sensitive things (because experience), and suddenly you cannot trust it anymore like that?