Claude Mythos Preview
Major release: A new general-purpose AI model from a leading lab, the kind behind ChatGPT, Claude or Gemini: a new flagship or generation.
Key facts
- Released
- Apr 7, 2026
- What it does
- Text and chat: Writes, answers questions and holds a conversation.Code: Writes, explains and fixes code.
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- How
- Limited access (waitlist or partners)
- Announced as
- “Claude Mythos Preview System Card”
From trckr's archive of releases before it started watching. Date and details from Epoch AI's database of AI models (CC BY 4.0).
Compare Claude Mythos Preview with
It came out 49 days after Claude Sonnet 4.6, the lab's previous model.
The details
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