Microsoft and retired military chiefs back AI company Anthropic in court fight against Pentagon

Microsoft and a group of retired military leaders are throwing their 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 Defense Secretary Pete Hegseth’s action last week to shut Anthropic out of military work by labeling its AI products as posing a threat to national security.