**Bug Description** the model switched to opus 4.8 when i am trying to use fable 5.0 to check my pre-launch startup code for vulnerabilities, etc. **Environment Info** - Platform: darwin - Terminal: Apple_Terminal - Version: 2.1.170 - Feedback ID: c9479dee-391c-43b6-9ff9-9bf2ec924cf3 **Errors** ```json [] ```

[Bug] Model unexpectedly switches to opus-4.8 when using fable-5

Status Closed — duplicate

Reported on v2.1.170

Maintainer reply None cached

Activity 3 comments · opened Jun 9, 2026 · closed Jun 13, 2026

Bug Description
the model switched to opus 4.8 when i am trying to use fable 5.0 to check my pre-launch startup code for vulnerabilities, etc.

Environment Info

Errors

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