Anthropic Launches Claude Fable 5.2, Mythos 5.2

Claude Fable 5.2 and Mythos 5.2 · Anthropic

Anthropic released Claude Fable 5.2 and Mythos 5.2 on November 9, 2026, priced at $8/$40 per million input/output tokens with output up to 30% faster than 5.1.

• Priced below Fable/Mythos 5.1 at $8 per million input tokens and $40 per million output tokens.
• Optional fast mode doubles the price to $16/$80 per million tokens for up to 2.5x faster generation.
• Mythos stays gated: access only via the expanded Life Sciences and Cyber Verification Programs.
• Fable 5.2 hits 49.1% on FrontierCode 2.0 at Xhigh effort, Anthropic's top released-model score.