Tech company files amicus brief in support of Anthropic’s effort to overturn an aggressive Pentagon designation
Microsoft has thrown its weight behind Anthropic’s legal challenge against the Pentagon, filing a court brief in support of the AI company’s effort to overturn an aggressive designation that effectively bars it from government work.
In an amicus brief submitted to a federal court in San Francisco this week, Microsoft, which integrates Anthropic’s AI tools into systems it provides to the US military, argued that a temporary restraining order was necessary to prevent serious disruption to suppliers whose products rely on the AI company’s technology. Google, Amazon, Apple and OpenAI have also signed on to a brief in support of Anthropic.
In a statement to the Guardian, Microsoft said: “The Department of War needs reliable access to the country’s best technology. And everyone wants to ensure AI is not used for mass domestic surveillance or to start a war without human control. The government, the entire tech sector, and the American public need a path to achieve all these goals together.
https://www.theguardian.com/technology/2026/mar/12/microsoft-amicus-brief-anthropic-pentagon