Release Summary
First Mythos-class frontier model, announced through Project Glasswing for defensive cybersecurity with AWS, Google, Microsoft, and other partners. Not generally available: restricted to vetted critical-infrastructure and security organizations. Demonstrated autonomous vulnerability discovery surpassing skilled humans; priced at $25/M input and $125/M output for partners.
Timeline
April 7, 2026
Claude Mythos Preview announced
Anthropic launches Project Glasswing and releases Mythos Preview to founding partners for securing critical software.
March 27, 2026
Polymarket post amplifies Claude Mythos market
Polymarket's X account highlights trading and discussion around a Claude Mythos release, fueling broader rumors about an unannounced Anthropic model.