The startup made a case for urgency to US District Judge
He also said that a financial services company paused its negotiations with Anthropic regarding a $50 million contract, a pharmaceutical firm asked to shorten the duration of its contract by 10 months, and a financial technology company “explicitly tied” reducing its $10 million contract to $5 million to Anthropic’s issues with the federal government. In all, Mongan said that Anthropic’s chief financial officer has estimated harm to its 2026 revenue could range from hundreds of millions of dollars to billions of dollars.
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A hearing on Anthropic’s request had been set for April 3. The judge moved it up to March 24.
Mongan asked for a commitment from the federal government that it would not take any retaliatory actions against Anthropic before the next hearing — such as by issuing an executive order impacting the AI startup.
“I’m not prepared to offer any commitments on that issue,” said James Harlow, a lawyer for the Justice Department.
Anthropic wants the judge to remove the supply-chain risk designation and require US agencies to withdraw directives related to it. The company claims it is being shut out for disagreeing with the administration and argues the legal principles at stake affect every federal contractor whose views the government dislikes.
Last week, the Pentagon formally notified Anthropic of its determination. Chief Executive Officer
Besides Microsoft, Anthropic has drawn support from other tech-industry players.
In a joint letter to the judge, dozens of AI scientists and researchers from OpenAI and
In its brief, Microsoft also warned of significant costs for government suppliers to remove Anthropic software and that the uniqueness of Anthropic’s products may leave some with no alternatives.
The case is Anthropic v. US Department of War, 26-cv-01996, US District Court, Northern District of California (San Francisco).
(Updates to highlight Microsoft’s amicus brief.)
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Peter Blumberg, Steve Stroth
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