Anthropic Sues Trump Administration Over AI Dispute with Pentagon

AI company alleges 'unlawful campaign of retaliation' after being labeled a national security threat

Published on Mar. 9, 2026

Got story updates? Submit your updates here. ›

Anthropic, a leading AI company, has filed a lawsuit against the Defense Department and other federal agencies after the Pentagon announced it would ban the use of Anthropic's products for defense purposes, citing the company as a threat to national security. Anthropic alleges the federal government's actions go beyond a normal contract dispute and represent an 'unlawful campaign of retaliation' that is 'jeopardizing hundreds of millions of dollars' and infringing on the company's First Amendment rights.

Why it matters

This dispute highlights the growing tensions between the tech industry and the federal government over the use of advanced AI systems, particularly in sensitive national security applications. The outcome could set important precedents around presidential authority, supply chain security designations, and the ability of private companies to challenge government actions that impact their business.

The details

Anthropic and the Pentagon have been in increasingly tense negotiations over how the military can use Anthropic's AI systems, with the company seeking stronger guarantees that its technology won't be used for mass surveillance or autonomous weapons, while the Pentagon wanted 'all lawful use.' After the two parties failed to reach an agreement by a Pentagon deadline, President Trump ordered all federal agencies to 'IMMEDIATELY CEASE' using Anthropic's technology. The Defense Secretary then officially designated Anthropic as a 'Supply-Chain Risk to National Security,' banning the company from doing business with the Pentagon and its contractors.

  • On February 27, 2026, President Donald Trump announced on Truth Social that all federal agencies must 'IMMEDIATELY CEASE all use of Anthropic's technology'.
  • Shortly after, on February 27, 2026, Defense Secretary Pete Hegseth announced on X that he would direct the Pentagon to label Anthropic as a 'Supply-Chain Risk to National Security'.
  • On March 9, 2026, the Pentagon officially informed Anthropic that the company was banned from doing business with the Defense Department and its contractors for defense purposes.

The players

Anthropic

An artificial intelligence company that has developed advanced AI systems, including its flagship product Claude, which have been used by the Pentagon and other federal agencies.

Donald Trump

The former President of the United States who ordered all federal agencies to cease using Anthropic's technology.

Pete Hegseth

The current Secretary of Defense who officially designated Anthropic as a 'Supply-Chain Risk to National Security'.

Dario Amodei

The CEO of Anthropic who has said the supply-chain risk label has never before been publicly applied to an American company.

Palantir

A data analytics company that has partnered with Anthropic to use its AI systems, including Claude, on classified Pentagon networks.

Got photos? Submit your photos here. ›

What they’re saying

“Seeking judicial review does not change our longstanding commitment to harnessing AI to protect our national security, but this is a necessary step to protect our business, our customers, and our partners. We will continue to pursue every path toward resolution, including dialogue with the government.”

— Anthropic Spokesperson (NBC News)

“The supply-chain risk label, historically reserved for foreign adversaries and associated companies that cannot be trusted in critical industries, has never before been publicly applied to an American company.”

— Dario Amodei, CEO, Anthropic (NBC News)

What’s next

The judge in the case will decide on whether to grant Anthropic's request to prevent the Trump administration from implementing the bans on the company's technology.

The takeaway

This dispute highlights the growing tensions between the tech industry and the federal government over the use of advanced AI systems, particularly in sensitive national security applications. The outcome could set important precedents around presidential authority, supply chain security designations, and the ability of private companies to challenge government actions that impact their business.