overview changedmodels/mythos-5-1/overview
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1313Context window: 1M tokens · Max output: 128K tokens · Input pricing: $10 / MTok · Output pricing: $50 / MTok
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15[Announcement](https://www.anthropic.com/claude-fable-and-mythos-5-1) · [Migration guide](https://platform.claude.com/docs/en/models/fable-5-1/migration-guide#migrating-from-claude-mythos-5-to-claude-mythos-5-1)
15[Announcement](https://www.anthropic.com/claude-fable-and-mythos-5-1) · [Migration guide](https://platform.claude.com/docs/en/models/fable-5-2/migration-guide#migrating-from-claude-mythos-5-1-to-claude-mythos-5-2)
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1717Claude Mythos 5.1 is available only to organizations verified through Anthropic’s verification programs, such as the [Cyber Verification Program](https://support.claude.com/en/articles/14604842). It has the same specifications and pricing as Claude Fable 5.1. To request access, apply to the program that covers your use case. [See Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) · [How refusals and fallback work](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback)
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