Last week, Anthropic pulled back the curtain on Claude Mythos Preview, an AI model so capable at finding and exploiting software vulnerabilities that the company decided it was too dangerous to release to the public. Instead, access has been restricted to roughly 50 organizations—Microsoft, Apple, Amazon Web Services, CrowdStrike and other vendors of critical infrastructure—under an initiative called Project Glasswing. The announcement was accompanied by a barrage of hair-raising anecdotes: thousands of vulnerabilities uncovered across every major...

Anthropic was discussing Mythos with the Trump administration, even after the Pentagon cut off business with the U.S. AI lab following a contract dispute.

Experts say Mythos potentially has an unprecedented ability to identify and exploit cybersecurity weaknesses.