[Bug] Unexpected automatic model switch to Opus disrupts active sessionsrea

Bug Description
I'm getting switched to Opus all the time from fable and there is nothing in the chat/prompts that should do this. When it happens, it literally breaks everything as i cant recover the deep thinking session. You do not deserve my money, and if I could get a refund i would!

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.173
• Feedback ID: bdc809f5-1960-4cda-8c1b-4d372f81779b

Errors

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