Is Anthropic's Claude Mythos a big stunt, or a real security threat? What the experts say. Anthropic put the entire tech world on notice last week with an unprecedented announcement: it made an AI model so advanced that it was too dangerous to release to the public. Anthropic said the new frontier language model, Claude Mythos Preview, would "reshape cybersecurity." Anthropic also announced the formation of Project Glasswing, an invite-only group of organizations — including some of Anthropic's biggest competitors — to test Claude Mythos Preview and secure their infrastructure. Anthropic said that Claude Mythos Preview "found thousands of high-severity vulnerabilities, including some in every major operating system and web browser." (Emphasis in original.) The company said Project Glasswing was necessary "to help secure the world’s most critical software." You May Also Like By Friday, CNBC reported that Federal Reserve Chairman Jerome Powell and Treasury Secretary Scott Bessent had summoned the high priests of finance (aka banking CEOs) for an emergency meeting about the new model. New York Times writer Thomas Friedman fretted over a "terrifying" future in which any teenager armed with Claude could hack the local power grid. The reaction to Claude Mythos Preview quickly split along predictable lines. AI boosters hailed the new model as proof that artificial general intelligence (AGI) was nigh, praising Anthropic for rolling it out so responsibly. Critics and AI skeptics called Project Glasswing a big publicity stunt. So, which is it? To find out, Mashable has been reviewing Anthropic's claims and talking to AI and cybersecurity experts. What is Claude Mythos Preview? Claude Mythos is a new large-language model that Anthropic says performs significantly better than Claude Opus 4.6 — widely considered one of the best AI models in the world — especially in cybersecurity. "In our testing, Claude Mythos Preview demonstrated