Anthropic releases Claude Fable 5.1
Anthropic launched Claude Fable 5.1 (claude-fable-5-1), successor to Claude Fable 5. Context is 1M tokens, max output 128k, price $10/$50 per MTok, cache reads $0.25 per MTok, on Claude API, Bedrock, AWS, Google Cloud, and Microsoft Foundry.
Models: Claude Fable 5.1
Source: Claude Developer Platform release notes, checked Sep 28, 2026. Summarized from the provider’s announcement.