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Anthropic
2026-07-10 22:39:13

Anthropic Leak Reveals Claude Mythos Outperforming Opus in Cybersecurity

Anthropic accidentally exposed details of its unreleased Claude Mythos model through a CMS misconfiguration. The leaked materials suggest the model surpasses Claude Opus 4.6 in coding, academic reasoning, and especially cybersecurity, with an initial limited rollout planned.

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Anthropic Leak Reveals Claude Mythos Outperforming Opus in Cybersecurity