[Bug] Anthropic API Error: Invalid Model Name claude-fable-5 with fallback to claude-opus-5
Status Open
Reported on v2.1.221
Maintainer reply None cached
Activity 0 comments · opened Aug 5, 2026
Bug Description
Category: cyber · Model: claude-fable-5 → fell back to claude-opus-5
Client: claude-vscode, CLI 2.1.221 / extension 2.1.222
13 refusals, 30 Jul – 5 Aug 2026
Request IDs: req_011CdXh1MvYBtE4e3hrGCAN7, req_011CdXkZhjQ77TSM4cC7A32H, req_011CdXm7Wnj17VxXuMhpgtby, req_011CdXmXHQjSpYDxJd9sHCqb
The point worth making: six of the thirteen flagged messages were "start", "continue", "run local", "run local host", "local host is not running", "push and deploy" — flagged purely from accumulated context during legitimate defensive security work (fixing an enumeration vulnerability in the user's own app).
Environment Info
- Platform: win32
- Terminal: null
- Version: 2.1.221
- Feedback ID: 137b6cc6-050f-471c-97e8-849e21565fbd
Errors
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