Cybersecurity

The IMF spring meetings were supposed to be about trade policy. Instead, every closed-door session circled back to one word: Mythos. Anthropic’s latest AI model has found thousands of high-severity vulnerabilities across every major operating system and browser on the planet. Not theoretical weaknesses. Exploitable ones. And it chains them together autonomously. Finance ministers are terrified. The global banking system just became the softest target on earth. What Mythos Actually Does Mythos doesn’t just scan for bugs. It reasons about them. It discovers a buffer overflow in one system, a privilege escalation in another, and a logic flaw in a third — then stitches them into a working attack chain without human guidance. ...

The Pentagon banned Anthropic’s products from the federal government barely a month ago. Now the White House is handing agencies the keys to Anthropic’s most dangerous model. Welcome to AI policy in 2026, where a six-week grudge can’t survive contact with a model that finds thousands of zero-day vulnerabilities before breakfast. From Persona Non Grata to Essential Asset Here’s the whiplash timeline. In early March, the Department of Defense slapped Anthropic with a supply chain risk designation — a label historically reserved for Chinese companies like Huawei. The move followed a bitter fight over military AI use that reportedly came to a head hours before U.S. strikes on Iran. Anthropic refused unrestricted military deployment. The Pentagon responded with the bureaucratic nuclear option. ...

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. ...

When an AI company tells the world it built something too dangerous to release, you’d expect fear. What Anthropic got instead was a bizarre cocktail of government panic, industry skepticism, media frenzy, and — let’s be honest — some of the best PR the AI industry has ever produced. Anthropic’s Claude Mythos Preview isn’t available to you. It’s not available to me. It’s available to roughly 11 organizations — Google, Microsoft, AWS, JPMorganChase, Nvidia, and a handful of others — through something called “Project Glasswing.” The reason? Anthropic claims Mythos can autonomously discover vulnerabilities in virtually any operating system, browser, or software product, then build working exploits. ...

An AI that finds security holes in every major operating system and web browser on Earth — then writes working exploits to hack them. The company that built it looks at what they’ve created and says: “We’re not releasing this.” Anthropic unveiled Claude Mythos Preview this week and immediately announced it would not be publicly available. Instead, through a new initiative called Project Glasswing, Mythos is being shared exclusively with about 45 organizations including Apple, Microsoft, Google, Amazon, Cisco, and the Linux Foundation. The mission: find and fix vulnerabilities before similar capabilities land in less responsible hands. ...

When Vice President JD Vance, Treasury Secretary Scott Bessent, and Fed Chair Jerome Powell all clear their schedules in the same week to discuss a single AI model, something fundamental has shifted. That’s exactly what happened around Anthropic’s limited release of Claude Mythos Preview. The U.S. government treated an AI model launch like a national security event — because it is one. Two Emergency Meetings, One Week The first gathering pulled together the heaviest hitters in tech: Anthropic CEO Dario Amodei, Elon Musk, Sundar Pichai, Sam Altman, Satya Nadella, plus the heads of CrowdStrike and Palo Alto Networks. The agenda wasn’t benchmarks or market share. It was scenario-planning for a world where AI tips the cybersecurity balance toward attackers. ...

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. ...

Anthropic spent months carefully planning the reveal of its most powerful AI model. Then someone forgot to flip a toggle, and the whole thing spilled onto the open internet. On March 26, security researchers discovered nearly 3,000 unpublished files sitting on Anthropic’s public-facing infrastructure — draft blog posts, internal PDFs, and detailed documents describing a model called Claude Mythos, codenamed “Capybara” internally. Anthropic has since confirmed it’s real, it’s in early testing, and it represents what they call a “step change” in AI capabilities. ...

Sometimes the biggest AI announcements aren’t announcements at all. They’re accidents. On March 26, a misconfigured content management system at Anthropic — the $60 billion company behind Claude — spilled nearly 3,000 unpublished assets into a publicly searchable data cache. Among the wreckage: a draft blog post describing Claude Mythos, which Anthropic has since confirmed is “by far the most powerful AI model we’ve ever developed.” This wasn’t a controlled product launch. It was a human error that gave the world an unfiltered look at what’s next in AI. And it’s equal parts thrilling and terrifying. ...