Claude Fable 5.2 ships with a 20% price cut and a 2.5x fast mode
Anthropic's new flagship pairs with Claude Mythos 5.2, an unrestricted sibling for vetted cybersecurity and life-sciences work, and both generate output up to 30% faster than their predecessors.
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on 9 November, calling them its most capable models yet. Fable 5.2 is live now through the API as claude-fable-5-2, on the Claude Platform, AWS, Google Cloud and Microsoft Azure, priced at $8 per million input tokens and $40 per million output, down from $10 and $50 for 5.1.
Standard output generates up to 30% faster than 5.1. A separate fast mode, priced at $16 and $80 per million tokens, pushes that to 2.5x, but it only runs on Claude Code, the Claude Platform, Google Cloud and Microsoft Foundry. Mythos 5.2 is the same underlying model with its cybersecurity and biology safeguards removed, available only to vetted organisations through Anthropic’s Cyber Verification and Life Sciences Verification programmes. Anthropic’s own benchmarks put both ahead of Opus 5.5 across the board it tested: 49.1% against 45.5% on FrontierCode 2.0, its agentic coding benchmark, at the hardest effort setting, and 64.9% against 39.4% on RoboDojo.
Why it matters: a 20% price cut paired with a genuine speed increase lowers the cost of running agentic coding and long tool-use chains on Anthropic’s top-tier model, closing some of the gap that previously pushed high-volume work down to Sonnet or Haiku.
The caveat: every benchmark figure here comes from Anthropic’s own announcement, not an independent evaluation.