Claude Mythos 5.2

anthropic/claude-mythos-5-2

Anthropic model for organizations approved through its cybersecurity or life-sciences verification programs. Shares the underlying model with Claude Fable 5.2, with different safeguards and access restrictions.

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Context window: 1M
Input: Text · Image
Output: Text
Released: 2026-11-09

Max output: 128K
Knowledge cutoff: 2026-06
Capabilities: Reasoning

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ModelRegistry · Catalog updated 2026-11-10