For informational purposes only

Date of the alleged leak: June 12, 2026

According to the wording, the seller positions himself as an intermediary. No evidence is provided in the listing.

Claude Mythos is a frontier model of the company [Anthropic](https://www.anthropic.com/), it is not publicly accessible and is used by a limited number of trusted organizations within the framework of Project Glasswing for cybersecurity reasons.

An alleged leak of Anthropic's restricted Claude Mythos model surfaced June 12, 2026. Seller claims intermediary status without evidence. Model serves trusted organizations for cybersecurity under Project Glasswing.

Sale of the source code for Claude Mythos from Anthropic