Anthropic's Mythos model found a 16-year-old bug in FFmpeg that was missed by automated tools after 5 million scans.

Anthropic's Mythos LLM is so capable at computer security tasks that Anthropic did not release it publicly, instead granting access only to critical software makers.

Anthropic believes that providing software developers with advanced AI tools, such as Claude Mythos Preview, offers a collective headstart in identifying and remediating vulnerabilities more rapidly.

The oldest vulnerability found by Mythos Preview was a 27-year-old bug in OpenBSD.

FFmpeg acknowledged a patch for a vulnerability found by Mythos.

The Mythos AI model is able to find zero-day vulnerabilities almost completely on its own with almost no guidance from a human.