According to Reuters, Anthropic has filed a lawsuit to prevent the Pentagon from adding the company it a national security blocklist. This comes days after the Department of Defense sent a letter to Anthropic confirming the company was labeled a supply chain risk; at the time CEO Dario Amodei had all but guaranteed Anthropic would fight back with legal action.

The lawsuit claims the designation was unlawful and violated first-amendment free speech rights as well as due process. “These actions are unprecedented and unlawful. The Constitution does not allow ​the government to wield its enormous power to punish a company for its protected speech,” Anthropic said in a statement published by Reuters.

Engadget received the following statement from an Anthropic spokesperson:

“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.”

The lawsuit comes after several weeks of back-and-forth between the AI company and the government. In late February, news broke that the Department of Defense and Defense Secretary Pete Hesgeth were pressuring Anthropic to remove certain safeguards from its AI systems, but Amodei made it clear the company would refuse to allow its model to be used for mass surveillance or development of autonomous weapons.

On the February 27 deadline, Amodei refused to budge, leading Hesgeth to threaten the company with the supply chain risk designation; he also said the US government would cancel its $200 million contract with the company. The same day, President Trump ordered all federal agencies to cease using Anthropic as well.

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