Zero-Day

Anthropic said Claude Mythos was too dangerous to release publicly. They shared it with 40 handpicked organizations. They committed $100 million to help patch the vulnerabilities it found. It leaked anyway. And now Google has confirmed the first known case of an AI-developed zero-day exploit being used by actual cybercriminals in the wild. The containment era lasted about six weeks. The Model That Finds What Humans Can’t Quick recap for anyone not tracking this saga: Claude Mythos Preview is Anthropic’s unreleased frontier model that autonomously discovers zero-day vulnerabilities — unknown flaws in software that developers haven’t patched because they didn’t know they existed. ...

An AI that finds security flaws faster than every human hacker on Earth combined. An AI that’s already found thousands of them — in your operating system, your browser, your bank’s software. That’s not a thought experiment. That’s Claude Mythos, and it’s forcing everyone from Fortune 500 CEOs to the Trump White House to completely rethink AI. Thousands of Zero-Days, One Model Claude Mythos Preview is Anthropic’s latest frontier model. It wasn’t built for cybersecurity — it’s general-purpose. But during internal testing, Anthropic discovered something startling: Mythos finds and exploits software vulnerabilities better than virtually any human alive. ...

The Treasury Secretary and the Fed Chair don’t pull bank CEOs into surprise meetings over product launches. They do it over threats. And last week, the threat was an AI model. Anthropic’s Claude Mythos Preview — announced April 7 — can autonomously discover and exploit zero-day vulnerabilities across every major operating system and web browser. Three days later, Treasury Secretary Scott Bessent and Fed Chair Jerome Powell had executives from Citi, Bank of America, Wells Fargo, Goldman Sachs, and Morgan Stanley in a room. ...

An AI just found security holes that human hackers missed for 27 years. And the company that built it says you can’t have it. This week, Anthropic did something the AI industry almost never does: it announced its most powerful model ever and simultaneously refused to release it. Claude Mythos Preview isn’t locked behind a paywall or a waitlist. It’s locked behind a vault door, with access restricted to a handpicked coalition of tech giants scrambling to patch the internet before someone else builds something similar. ...

There’s a new AI model that finds software vulnerabilities humans missed for decades — and its creators are so spooked by what it can do, they’re refusing to release it. Anthropic just unveiled a preview of Claude Mythos, their most powerful model yet. But instead of the usual launch playbook — benchmarks, API waitlists, developer hype — the announcement came wrapped in a warning. Mythos is so capable at finding and exploiting bugs that Anthropic formed an emergency coalition of tech giants to deploy it defensively before the bad guys build something similar. ...