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Anthropic's top skeptic spent two weeks trying to prove its most powerful model was overhyped. It wasn't — and what he found could protect your business.
Nicholas Carlini's whole job is to doubt AI. So when he pointed Anthropic's most powerful model at the Linux kernel — the code running most of the internet — he expected noise. Instead, one AI surfaced 479 real security bugs in software he'd never cracked himself, plus a critical flaw in Ghost that attackers were exploiting within weeks. That same push is now hardening the code behind Apple, Microsoft, Google, JPMorgan and roughly 200 other organizations.
The full story — how the "Carlini Loop" works, and the one simple habit that keeps your tools safe no matter what — is on the site.
Quick Bites
Anthropic's two most powerful models went dark — A federal export-control order pulled Fable 5 and Mythos 5. Whatever happens next, the lesson is permanent: never single-source the AI your work runs on — keep a fallback like Opus 4.8 one setting away.
The Carlini Loop has become a cult document — His talk demonstrating the technique has racked up hundreds of thousands of views in security circles.
Claude Security brought it to the rest of us — The public-beta scanner reads your codebase and suggests patches for review, putting the same bug-hunting in every team's hands.
The full breakdown — how the loop works, the Ghost-bug timeline, and what it means for your stack — is on the site.
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