Anthropic 'Claude Mythos' AI Model Revealed in Data Leak — Described as 'Step Change' in Capabilities
Anthropic’s next major AI model has a name — and the company didn’t exactly choose the moment to reveal it. Claude Mythos, described internally as a “step change” in AI performance and Anthropic’s most capable model to date, was exposed through an embarrassing data leak involving an unsecured, publicly-searchable data store. Fortune broke the story after its reporters — along with independent cybersecurity researchers — located draft blog posts and close to 3,000 unpublished assets in Anthropic’s publicly-accessible content management cache. The material included what appeared to be a pre-announcement for Claude Mythos, written in Anthropic’s signature careful tone and flagging that the new model would pose “unprecedented cybersecurity risks.” ...