NSA Adopts Anthropic's Mythos AI Model Amid Pentagon Tensions

The National Security Agency (NSA) is reportedly using Anthropic’s new Mythos Preview AI model, according to Axios, which cited two anonymous sources familiar with the matter.

This development comes despite a months-long feud between Anthropic and the Pentagon. In early April, Anthropic introduced Mythos Preview as a general-purpose language model with “strikingly capable” performance in computer security tasks.

However, in February, former President Donald Trump issued an executive order requiring all federal agencies to cease using Anthropic’s services. The order followed disputes over military safeguards during contract negotiations.

White House Meeting and Mixed Reactions

Days before the report, Anthropic CEO Dario Amodei met with White House Chief of Staff Susie Wiles and other officials to discuss Mythos. The White House later described the meeting as “productive and constructive.”

When asked by reporters, President Trump stated he had “no idea” about the meeting, according to Reuters.

NSA’s Use of Mythos Preview

According to Axios’ sources, the NSA is one of approximately 40 organizations granted early access to Mythos Preview. One source confirmed that the model is “being used more widely within the department.”

Legal Battle Continues

Anthropic remains embroiled in a legal dispute with the U.S. government. In March, the company filed lawsuits against the Department of Defense in two courts after the Trump administration designated it a “supply chain risk.”

The Pentagon responded shortly after. While one court granted Anthropic a preliminary injunction to temporarily block the designation, another federal judge denied its motion to lift the label.