Fable 5.5 leak: litellm code shows Anthropic model in staging, launch tipped for Oct 27
imjustnewatai · x · 2026-10-21
A leak suggests Anthropic's Fable 5.5 is in staging and due next week, likely Tuesday October 27. Evidence: litellm merged a PR adding azureai/claude-fable-5-5 (listed as Generally Available on Azure's Models API, deprecation 2027-12-05), after several add/remove cycles in registry audits. Partner platforms including Cursor, Devin, and Artificial Analysis are preparing for the model ID. Both Fable 5 and 5.1 previously launched on Tuesdays.
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