US Marine Corps will not be using Claude AI LLMs as part of Maven

US Army Captain with the National Guard Bureau seen using the Maven Smart System in Arlington, Virginia in February 2026. (National Guard Bureau/Master Sgt. Whitney Hughes)

The US Marine Corps (USMC) will not be using Anthropic's Claude AI large language models (LLMs) as part of the Maven Smart System (MSS), Colonel Arlon Smith, Director of Project Dynamis, told Janes in an interview on 20 March.

Col Smith referenced the US Department of Defence's (DoD's) stance on Anthropic. “As you know, the department recently issued guidance that we're not going to be using Claude AI models,” he said.

Anthropic received a letter from the DoD on 4 March stating that the company was designated a supply chain risk to US national security, the company acknowledged in a 5 March press release. On 27 February Pete Hegseth, US Secretary of Defence, said on social media that “in conjunction with the President's directive for the federal government to cease all use of Anthropic's technology, I am directing Department of War to designate Anthropic a supply-chain risk”. In the post, he said that “effective immediately”, any company that conducts business with the US military must cease business with Anthropic. According to Hegseth's post, Anthropic was expected to provide its services for up to six months for a smooth transition.

Core components