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0.83.2
September 1, 2026

Claude Fable 5.1

Fable 5.1 against a blue sky

Claude Fable 5.1 is now available in Conductor.

Anthropic's most capable model is built for ambitious, long-running coding and knowledge work. It improves on Fable 5 across coding, knowledge work, and long-running problem solving while costing ~25% less.