According to a report by Axios, the National Security Agency is using Anthropic’s new Mythos Preview. Axios said the model was being used more widely within the department. The model was introduced in the beginning of April, with it being described as a general-purpose language model that is “strikingly capable at computer security tasks.”
This comes days before the Anthropic CEO Dario Amodei met with White House Chief of Staff Susie Wiles and other officials, reportedly to discuss Mythos. The White House later said the meeting on Friday was “productive and constructive,” though President Trump said he had “no idea” about it when asked by reporters. This comes despite Anthropic’s designation as a supply chain risk following disagreements between the company and the Pentagon.
READ: Anthropic Mythos sparks concerns among the finance community over security risks (April 17, 2026)
The Axios report mentioned that sources said the NSA was using Mythos, while one said the model was also being used more widely within the department. While it is not clear how the NSA is using the model, other organizations with access to the model are using it predominantly to scan their own environments for exploitable security vulnerabilities.
Anthropic had restricted access to Mythos to around 40 organizations, claiming that its offensive cyber capabilities were too dangerous to allow for a wider release. Anthropic had only announced 12 of those organizations, and a source mentions that NSA was among the unnamed agencies with access.
The NSA’s UK counterparts have said they have access to the model through the country’s AI Security Institute.
READ: Trump administration may be pushing banks to trial Anthropic Mythos (April 13, 2026)
Anthropic is still involved in a legal battle with the U.S. government after the company filed lawsuits against the Department of Defense in two courts in March after it was deemed a supply chain risk by the Trump administration. While one court granted Anthropic a preliminary injunction, to temporarily block this designation, federal judges in the other denied its motion to lift the label.
Finance ministers, bankers, and financiers have recently expressed concerns about the Mythos model, over its potential to undermine security of financial systems. Experts say the model potentially has an unprecedented ability to identify and exploit cybersecurity weaknesses, though others caution further testing is needed to properly understand its capabilities.
The Trump administration recently summoned bank executives for a meeting where the U.S. Treasury Secretary Scott Bessent and Federal Reserve Chair Jerome Powell encouraged the use of Anthropic’s latest model to detect vulnerabilities, according to Bloomberg.