[Bug] Model downgraded to Opus 4.8 when attempting to let Claude Fable 5 search the web about itself.

Open 💬 2 comments Opened Jun 11, 2026 by boyleryan

Bug Description
The cyber safety classifier kicked me from Fable 5 to Opus 4.8 when I sent Claude a pretty tame prompt, telling it to have some fun during a break and search the web for information about itself.

Environment Info

  • Platform: darwin
  • Terminal: ghostty
  • Version: 2.1.170
  • Feedback ID: d99f4d58-6cb7-42e7-9d82-703953fa3bbc

Errors

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