Anthropic’s Legal Battle with the Department of War Carries Greater Stakes During AI Surge

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While Anthropic’s lawsuit against the U.S. Department of War may not have been unexpected, it remains a startling development.

Such events, though rare, do occur and typically represent a final recourse. For over a week, the Pentagon and the $380 billion-valued Anthropic have been embroiled in a highly public dispute concerning the permissible uses of AI by the Trump Administration. This culminated last week with Secretary of War Pete Hegseth labeling the company a “supply chain risk.”

In the lawsuit, filed yesterday in the U.S. District Court for the Northern District of California, Anthropic alleges the Pentagon’s measures are “unprecedented and unlawful.” The company further contends that “hundreds of millions of dollars” in government contracts are now canceled or at risk. Anthropic provided this statement to my colleague Beatrice Nolan: “Pursuing judicial review does not alter our enduring dedication to leveraging AI for national security, but this action is essential to safeguard our business, customers, and partners.”

Essentially, the message is, “we’re not letting this go.” It is important to note there is clear precedent for major, emerging tech corporations suing the government, though under different conditions. Take Palantir: in 2016, it sued the U.S. Army over its intelligence software procurement, claiming an unfair competitive process—a federal judge later ruled in Palantir’s favor. A comparable situation arose in 2014 when SpaceX sued the U.S. Air Force. SpaceX insisted its rockets be permitted to compete for crucial launches, leading to an eventual settlement. (Subsequently, SpaceX secured numerous launch contracts.) Even established players face similar battles: the Department of Defense’s $10 billion JEDI cloud contract with Microsoft prompted separate lawsuits from Amazon and Oracle—a controversy the government only ended by canceling the contract in 2021.

So, these conflicts do arise. However, the clash between the Pentagon and Anthropic is notable not only for its substance, which includes ethical debates about using AI for autonomous lethal force, but also for the enormous financial implications. In February, the company secured a $30 billion Series G round, adding to the vast sums already invested in this primary rival to OpenAI. As reported last week by ‘s Jessica Mathews, investors have largely supported Anthropic CEO Dario Amodei thus far—yet the path ahead promises to be challenging.

If anything, the dispute is likely to become even more visible to the public.

A call for your questions… For the upcoming episode of the Term Sheet Podcast, I will interview Harvey CEO Winston Weinberg and would like to pose your questions to him. Do you have queries for Winston? Send them to alexandra.garfinkle@.com.

See you tomorrow,

Allie Garfinkle
X: @agarfinks
Email: alexandra.garfinkle@.com

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