It was the first time a US company had been publicly given the label, which means a technology is not secure enough for government use.

Anthropic has been used in high-level government and military work since 2024.

It argued in court that the label was simple retaliation by Defence Secretary Pete Hegseth, because Amodei had refused to grant the Pentagon unfettered use of its AI tools over fears of Anthropic being used for mass domestic surveillance and fully autonomous weapons.

While a federal court in California has largely agreed, a federal appeals court has denied the firm’s request to temporarily block the supply chain risk designation.

Nevertheless, Anthropic’s tools are still in use at many of the government agencies that had been using them before the designation, according to court records.

Until Friday, the White House had said little positive about Anthropic.

When Trump directed all government agencies to stop using Anthropic, he wrote on social media that the company was run by “left wing nut jobs”, who were attempting to “strong arm” defence.

“We don’t need it, we don’t want it, and will not do business with them again!” Trump wrote.

As he arrived for an event in Phoenix, Arizona, on Friday, Trump was asked by reporters about the Anthropic CEO’s visit to the White House. The president said he had “no idea” about the meeting.