Anthropic recently developed a new AI model named Claude Mythos Preview.

Anthropic's Claude Mythos model is a much bigger, more expensive, slower, but more powerful model compared to Opus.

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 released a new AI model named Mythos, which is an upgrade from previous models like Sonnet, Opus, and Haiku.

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

Anthropic has been using the Claude Mythos model internally since February 24th, 2026.