Axios Exclusive: NSA Uses Anthropic Mythos Defying Blacklists

Secret services cannot afford to ignore the best technologies, even if they are formally banned. On April 20, 2026, Axios, citing sources, reported that the US National Security Agency (NSA) is actively using the Anthropic Mythos model.

Ironically, this is happening against the backdrop of official Pentagon "blacklists" on the use of commercial LLMs for security reasons. The news confirms Mythos’s reputation: while banks (as we wrote this morning) fear this model like the plague due to its cyber potential, intelligence agencies, on the contrary, are adopting it. The algorithm’s ability to analyze architectural code and find 0-day vulnerabilities makes it an ideal weapon in the intelligence arsenal. This is a report-level story, but it clearly shows that the US state machine has already made its choice in the cyber arms race.

Source: Axios / Reuters