Microsoft supports Anthropic in legal fight against Pentagon move he Pentagon took the action against Anthropic after an unusually public dispute over the company's refusal to allow unrestricted military use of its AI model ClaudeAPMicrosoft is throwing its weight behind Anthropic in asking a federal court to block the Trump administration's designation of the artificial intelligence company as a supply chain risk. Microsoft, in a legal filing, is challenging Defence Secretary Pete Hegseth's action last week to shut Anthropic out of military work by labelling its AI products as a national security threat. ADVERTISEMENTThe Pentagon took the action against Anthropic after an unusually public dispute over the company's refusal to allow unrestricted military use of its AI model Claude. Microsoft also sided with Anthropic's two ethical red lines that were a sticking point in the contract negotiations. "Microsoft also believes that American AI should not be used to conduct domestic mass surveillance or start a war without human control," Microsoft said.

Source: The Telegraph March 11, 2026 15:51 UTC