The US National Security Agency (NSA) is utilizing Anthropic’s AI model, Mythos, for cyber attack operations. This collaboration comes amidst a legal dispute between Anthropic and the Pentagon regarding the Claude model. Anthropic has reportedly assigned several staff members to work directly within the NSA. This partnership highlights the increasing integration of AI technologies in national security efforts.

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US National Security Agency using Anthropic’s Mythos for cyber attacks

Arrangement comes as AI lab is locked in legal battle with Pentagon over Claude model

A smartphone screen displays the Anthropic logo with a stylised ‘AI’ symbol, set against a blurred green background. Anthropic has installed about half a dozen staff within the agency© AFP/Getty Images

Cristina Criddle in San Francisco and Demetri Sevastopulo in Washington

PublishedJune 4 2026

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