In a confrontation with Hegseth, it’s only a matter of time before Anthropic falls into line. The company’s rival, OpenAI, has been quick to accept a permissive contract for military-use cases. (File photo) The United States National Security Agency is using Anthropic’s Mythos Preview AI tool despite the Pentagon giving the company a formal supply-chain risk designation, Axios reported on Sunday.

Axios, citing sources, said the Mythos Preview model is being used more widely within the department. Reuters could not immediately confirm the report.

Anthropic, the NSA and the Defense Department did not immediately respond to requests for comment outside regular business hours. NSA is part of the Department of Defense. Last week, US President Donald Trump’s administration and Anthropic’s CEO discussed working together for the first time since a dispute between the Pentagon and the AI ​​firm over how that company’s models should be used.