Anthropic Banned by Pentagon After AI Contract Dispute

Startup's technology was first to be deployed in classified DOD networks, but relationship soured over political tensions

Published on Mar. 9, 2026

Got story updates? Submit your updates here. ›

The Pentagon has banned the use of technology from AI startup Anthropic, designating the company as a supply chain risk in an unprecedented move. Anthropic had been awarded a $200 million DOD contract and its AI models were the first to be deployed in the agency's classified networks, but the relationship soured due to political tensions between the company's leadership and the Trump administration. The decision leaves the military without its hand-picked AI models and raises concerns among experts about the precedent it sets.

Why it matters

Anthropic's partnerships with Amazon Web Services and Palantir had helped the company make significant inroads into the Defense Department, with its AI models being praised for their capabilities. The Pentagon's sudden reversal and designation of Anthropic as a supply chain risk, a label typically reserved for foreign adversaries, is seen as highly unusual and raises questions about the role of politics in technology procurement decisions.

The details

Anthropic, founded in 2021 by former OpenAI researchers, had built a reputation for responsible AI development. The company's AI models, known as Claude, were adopted by various federal agencies due to their strong auditing and verification capabilities. However, tensions arose between Anthropic and the Trump administration, with the company's CEO Dario Amodei publicly criticizing the president. This led to a dispute over the use of Anthropic's technology, with the DOD wanting unfettered access while the company sought assurances that it would not be used for autonomous weapons or domestic surveillance.

  • In July 2025, Anthropic announced a $200 million defense contract and said its technology had "accelerated mission impact across U.S. defense workflows with partners like Palantir".
  • In January 2026, President Trump was sworn into office, and Amodei's dislike for the president became known.
  • By mid-February 2026, Anthropic's negotiations with the DOD had stalled, leading to the Pentagon's decision to ban the company's technology.

The players

Anthropic

An American artificial intelligence company founded in 2021 by former OpenAI researchers, known for its focus on responsible AI development.

Dario Amodei

The co-founder and CEO of Anthropic, who has publicly criticized President Trump.

Department of Defense (DOD)

The U.S. government's military department, which had awarded a $200 million contract to Anthropic and was using the company's AI models in its classified networks.

Donald Trump

The former President of the United States, whose administration designated Anthropic as a supply chain risk, an unprecedented move.

David Sacks

The White House AI and crypto czar, who accused Anthropic of supporting "woke AI" and running a "sophisticated regulatory capture strategy".

Got photos? Submit your photos here. ›

What they’re saying

“You're not so excited if you're in the military. They view Claude as being a better product, the most reliable, with the most user friendly outputs they can assimilate into planning.”

— Brad Carson, Co-founder and president of AI policy nonprofit Americans for Responsible Innovation (CNBC)

“This feels to me like a dispute that is about politics and personalities. It's masquerading as a policy dispute.”

— Michael Horowitz, Senior fellow for technology and innovation at the Council on Foreign Relations (CNBC)

“You're not going to walk away from technologies that are deeply embedded in your wartime processes right before you go to war.”

— Jacquelyn Schneider, Hargrove Hoover fellow at Stanford University's Hoover Institution (CNBC)

What’s next

Anthropic has said it will challenge the Pentagon's designation of the company as a supply chain risk in court, but the timeline for a lawsuit is unclear. In the meantime, federal agencies are already beginning to transition away from using Anthropic's AI models, a process that is expected to be especially complicated for the Department of Defense given its reliance on the technology.

The takeaway

The dispute between Anthropic and the Pentagon highlights the growing tension between the tech industry and the government, particularly when it comes to the development and deployment of powerful AI technologies. It also raises concerns about the role of politics in technology procurement decisions, and the potential consequences of such decisions for national security and the military's capabilities.