20260517N Mythos logo

Anthropic has restricted access to Claude Mythos, a powerful AI tool that can discover vulnerabilities in major operating systems, over the cybersecurity risks it poses. (Photo by Suzu Takahashi)

TOKYO — Japan will draw up guidelines on how to bolster cybersecurity with Anthropic’s Claude Mythos model, including such steps as requesting software providers to check for vulnerabilities using the powerful AI tool.