​​Anthropic just shipped the public AI that found 271 zero-day bugs in Firefox alone

Rickler Feed (@rickler_feed), Jun 10, 2026, 10:00 UTC

​​Anthropic just shipped the public AI that found 271 zero-day bugs in Firefox alone Claude Fable 5 tops nearly every benchmark, and under the hood it's Mythos: the model that can exploit every major OS and browser. A cyber weapon, wrapped in a safety layer, now public.

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