Well I have just tested it and GPT 5.5 is still smarter. It catches bugs that Fable doesn’t. Anthropic Fable is basically still sloppy like Opus 4.x. And I got also the downgrade for “cyber violations” trying to build a custom Debian ISO…that tells me their safeguards are sh**. I didn’t ask it to hack anything. Just to make a script that builds a custom Debian distribution with various settings…so this Fable thing seems like a flop&slop already. That warning plus the privacy change is the wake up call to move from Anthropic