The Morning Brief — April 8, 2026
Anthropic’s New Mythos Model Found Zero-Days in Every Major OS and Browser — And They’re Not Releasing It
Anthropic quietly dropped what might be the most consequential model announcement in months: Claude Mythos Preview, a cybersecurity-focused AI that apparently found security vulnerabilities in every major operating system and web browser, deployed as part of the industry consortium Project Glasswing alongside Apple, Google, Nvidia, Microsoft, AWS, and 40+ other organizations. The defensive framing is smart — this is positioned as a tool for finding and patching vulnerabilities before the bad guys do — but let’s be honest about what we’re really looking at: an AI so capable of offensive security work that Anthropic explicitly chose not to release it publicly. That’s not a press release, that’s a warning label.