Claude Mythos Preview
Preview language model release
A Claude language-model release labeled as a preview. No publicly verifiable first-party Anthropic page naming this exact release could be confirmed in this session.
Pricing
Official site · Jun 14, 2026, 1:09 PM
Input / 1M
$25.00
Output / 1M
$125.00
Gated research preview / Project Glasswing access. The cited first-party page does not state a separate cached-input price for this model.
Anthropic's official Project Glasswing page explicitly states that Claude Mythos Preview is available to participants at $25 per million input tokens and $125 per million output tokens, with access via the Claude API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry.
Model Intelligence
Benchmarkable
Yes
Model level
release
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