The AI startup said around 50 carefully selected partners, including technology firms and research organisations, were given limited access to the model over recent weeks. Mythos Preview was used to scan more than 1,000 open-source software projects during the trial.

Anthropic's Mythos Preview has uncovered "more than 10,000 high-or critical-severity vulnerabilities" across widely used software systems.

Upon request, “qualifying” customers can use things like skills, a Claude harness, and a threat model builder, Anthropic says as part of a bigger update about Project…