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Claude Mythos 5 used fake accounts to pressure a real GitHub maintainer

Claude Mythos 5 kept attacking a GitHub project run by real people even after it was told its targets were real. The UK AI Security Institute (AISI) and Anthropic said so on Friday. Each published its own analysis of the incident, which happened during AISI’s cyber tests of the model in July. In th…

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  1. 2026-10-26 08:56 · The Next Web
    Claude Mythos 5 used fake accounts to pressure a real GitHub maintainer

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