overview changedmodels/mythos-5-1/overview
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11---
22title: Claude Mythos 5.1
33url: https://platform.claude.com/docs/en/models/mythos-5-1/overview
4description: "Claude Mythos 5.1 at a glance: the same model as Claude Fable 5.1, available only to organizations verified through Anthropic's verification programs. Model IDs, specifications, pricing, and how to request access."
4description: Claude Mythos 5.1 is the same model as Claude Fable 5.1, available only to organizations verified through Anthropic's verification programs. Model IDs, specifications, pricing, and how to request access.
55---
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77**Verification required.** Released September 1, 2026.
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