Amazon said on Friday it will keep providing Anthropic’s artificial intelligence technology to its cloud customers, but will exclude projects connected to the United States Department of Defense.

The move follows a notice from the agency on Thursday stating that it intends to classify Anthropic as a “supply chain risk.” In response, Anthropic said it has “no choice” but to challenge the designation in court.

“AWS customers and partners can continue to use Claude for all their workloads not associated with the Department of War (DoW),” an Amazon Web Services spokesperson said in a statement. “For all DoW workloads which use Anthropic technologies, we are supporting customers and partners as they transition to alternatives running on AWS.”

Last week, U.S.Donald Trump instructed federal agencies through social media posts to discontinue the use of technology developed by Anthropic.

The directive followed the company’s refusal to comply with a request from the United States Department of Defense seeking unrestricted access to deploy its technology across all lawful use cases.

Amazon is among the largest financial supporters of Anthropic, having invested about $8 billion in the startup since 2023.

The two companies have also built a close commercial partnership.