Anthropic's testing found that Mythos Preview can identify and exploit zero-day vulnerabilities in every major operating system and web browser when directed by a user.

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.

Anthropic has committed up to $100 million in usage credit for Mythos preview across defensive efforts and $4 million in direct donations to open-source security organizations.

Anthropic will not widely release its Claude Mythos Preview model because of its potential to cause harm if misused.

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