Anthropic's unannounced "Fable 5.5" model spotted in public GitHub commit credits
mark_k · x · 2026-10-21
- A T3 Code pull request merged on October 20 includes commits from October 17 credited Co-authored-by: Fable 5.5 <[email protected]>, with changes fixing an authentication issue affecting locally hosted clients.
- This fits earlier reports that partners are testing Anthropic's next model.
- Caveat: anyone can edit a commit's co-author field, so the credit alone doesn't prove which model wrote the code; Anthropic has not officially announced Fable 5.5.
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