[Bug] Model Fallback: Fable 5 (1M) reverts to Opus 4.8 instead of Opus 4.8 (1M)

Status Closed — not planned
Reported on v2.1.170
Maintainer reply None cached
Activity 1 comment · opened Jun 10, 2026 · closed Jul 18, 2026

Bug Description
why does the Fable 5 (1M) revert to Opus 4.8 normal instead of Opus 4.8 (1M)? And it triggers so much false positives that you should refund the sessions usage on Fable if this happens as it compacts to Opus 4.8 normal and then again spends usage going to Opus 4.8 1M context

Environment Info

  • Platform: darwin
  • Terminal: iTerm.app
  • Version: 2.1.170
  • Feedback ID: 99be2ae3-b5c5-4b79-b58b-73353f304585

Errors

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