Anthropic releases Claude Fable 5.2 and Mythos 5.2 two months after CEO urges AI slowdown

The latest Fable update arrives two months after version 5.1, cutting token costs while claiming performance gains of up to 30% Anthropic has released Claude Fable 5.2, the newest version of its top-tier model family. It launched on November 9, 2026, alongside a restricted sibling called Claude Mythos 5.2. The headline numbers are a performance gain of up to 30% over Fable 5.1 and a lower price. Pricing is the clearest change. Fable 5.2 costs $8 per million input tokens and $40 per million output tokens. The previous rates were $10 for input and $50 for output. That works out to a 20% cut on both sides of the meter. On performance, the research describes an improvement of up to 30% over Fable 5.1.

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