Some users noted that the descriptions for the model appear to be duplicated from the earlier Fable 5.1 version, despite the distinct new model ID. This appearance follows the release of Meta Muse Wonder Full and the anticipated launch of Gemini 4, prompting speculation that the deployment is linked to a potential IPO for Anthropic.
Wednesday, October 21, 2026
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Microsoft Azure Lists Claude Fable 5.5 as Generally Available
AI8 days ago
Traces of a new model ID were discovered in LiteLLM’s GitHub data and by a TrueFoundry bot monitoring cloud configurations. The listing identifies the AI as Anthropic’s Claude Fable 5.5 and marks its status as 'GenerallyAvailable' within the East US 2 model catalog of Microsoft Azure. A monitoring bot specifically flagged the model path as 'microsoft-foundry/claude-fable-5-5', though Microsoft has not issued an official announcement.
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