AI: Anthropic Gets Major Reprieve in Its Battle Against the Pentagon

New episode in the confrontation between the Trump administration and Anthropic. The American judiciary has just abruptly halted a Pentagon offensive against the company behind Claude. A decision that could reshape the balance of power in a sector that has become highly strategic for the economy and American sovereignty.

A federal judge stops the Pentagon, Anthropic’s AI stays in the game

Yesterday, March 26, in San Francisco, federal judge Rita Lin, of the Northern District of California court, dealt a blow to the Pentagon’s ambitions. She issued a preliminary injunction that immediately suspends two key measures of the Trump administration.

Specifically, the judiciary freezes both the classification of Anthropic as a national security threat and the order imposed on federal agencies to cease all use of Claude, its artificial intelligence model.

The judge did not mince words. She called these measures “arbitrary, capricious, and constituting an abuse of discretionary power.” Even more, she ruled on the ethical core of the case:

Nothing in the current law supports the Orwellian idea that an American company could be labeled a potential adversary and saboteur of the United States for expressing disagreement with the government.

A sharp statement that alone summarizes the seriousness of the matter. It clearly suggests that the State crossed a red line in sanctioning a company for its public positions.

To understand this escalation, one must look back to summer 2025. At that time, Anthropic and the Pentagon were negotiating a strategic partnership. The goal was ambitious: to integrate Claude as the first advanced AI model authorized to operate on classified networks.

However, discussions bogged down and then broke off in February 2026. The Pentagon hardened its stance and demanded unrestricted access to the technology, including for sensitive uses. Among them: development of lethal autonomous weapons and mass surveillance devices on U.S. soil.

Anthropic categorically refuses. For the company, these uses cross non-negotiable ethical boundaries. From then on, the break-up became inevitable and opened the way for a now public legal battle.

From a lawsuit to a provisional judicial victory

The Trump administration’s reaction did not wait. At the end of February, Donald Trump ordered all federal agencies to stop using Anthropic products. 

Shortly thereafter, the Pentagon put the startup on its blacklist of risky suppliers, a list that until then only included foreign companies like Huawei or Kaspersky.

Faced with these measures, Anthropic responded on March 9, 2026, by suing the U.S. government in a federal court in Washington D.C. The company denounced a blatant violation of the First Amendment: sanctioning a company for exercising its freedom of speech amounts, according to it, to “destroying” a major player in American AI. 

This recourse receives unexpected support from 37 engineers and researchers from Google DeepMind and OpenAI, who file an amicus brief in favor of Anthropic.

During a 90-minute hearing on March 24, Judge Lin questioned government lawyers on one specific point: Is Anthropic being punished for publicly criticizing the Pentagon?

The implicit answer of her decision, rendered two days later, is unambiguous. She speaks of “classic illegal retaliation, contrary to the First Amendment.”

This decision goes far beyond the simple Anthropic case. It establishes a principle: no administration can use its economic power to muzzle a private company on the grounds that it refused to collaborate on projects contrary to its ethical values. 

With 32% market share of the enterprise AI market recorded in 2025, according to Menlo Ventures, Anthropic is not a minor player; its weakening would have direct repercussions on the technological competitiveness of the United States against China. The legal battle is not over, but Anthropic has, for now, scored a decisive point.