[BUG] Fable 5 fallbacks to opus for all questions since you are using memory for classifier and memory from sessions show I do cell biology research

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I work on Claude code daily and have been unable to use fable at all because you use memory to gate the classifier since the classifier knows I developed a 3d segmentation app for cell biologists. If I use fable outside Claude code it never does this with exact same prompt. It’s totally prevented me from using it effectively within Claude cli for code that has nothing to do with code exploits or anything remotely dangerous. This needs to be fixed because it’s preventing paying users from having access to your best model. You seriously need to work on your classifier since it’s completely blocking access for a large group of scientists.

What Should Happen?

Stop using classifier to gated to user memory

Error Messages/Logs

Steps to Reproduce

Ask any question and falls back immediately to opus 4.8

Claude Model

Other

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

201

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_