AILenny's Newsletterabout 6 hours ago

Claude Mythos found 15-year-old Firefox bug

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Mozilla engineer Brian Grinstead and his team used an agentic bug-finding pipeline with Anthropic's Mythos model to ship a record month of security fixes for Firefox. The pipeline's harness and verifier subagent did as much work as the model. A 15-year-old bug was discovered in the process.

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