Claude Fable 5.2 cuts prices 20% to $8/$40 per M tokens, adds 2.5x fast mode
claudeai · x · 2026-11-10
Anthropic released Claude Fable 5.2 and Mythos 5.2. Key points from the announcement:
- Pricing: Fable 5.2 costs $8/M input and $40/M output tokens, down 20% from $10/$50; an optional fast mode boosts generation up to 2.5x at $16/$80. Available on all paid plans, the Claude Platform, and major clouds.
- One model, two brands: Fable ships with strong cybersecurity and biology safeguards for all users; organizations in cybersecurity or biomedical research can apply for Mythos via the Life Sciences and Cyber Verification Programs.
- Pre-release results: infeasible software migrations, three working devices designed from scratch, progress on two open black-hole physics problems, and a 30-hour formalization of Fermat's Last Theorem.
- Safety: novel evaluations for behaviors like sandbox escapes, plus extensive prerelease safety testing.
Related event: Anthropic Releases Claude Fable 5.2 and Mythos 5.2(29 posts)→
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