TL;DR

President Trump ordered all federal agencies to immediately stop using Anthropic technology after the Pentagon and the AI company failed to reach agreement on safety guardrails. Defence Secretary Pete Hegseth designated Anthropic a supply-chain risk — a classification normally reserved for foreign adversaries — while OpenAI quickly stepped in to fill the gap.

The breakdown

The Department of Defence and Anthropic reached an impasse after the Pentagon demanded the company loosen ethical guidelines on its Claude AI system. Trump weighed in just an hour before a negotiation deadline, writing on Truth Social that Anthropic was a “Radical Left AI company” trying to “STRONG-ARM the Department of War.”

Defence Secretary Hegseth followed with a supply-chain risk designation, declaring that “no contractor, supplier, or partner that does business with the United States military may conduct any commercial activity with Anthropic.” The Pentagon had a $200 million, two-year agreement with the company.

Anthropic holds firm

Anthropic’s red lines are specific: it will not allow Claude to be used for mass domestic surveillance or fully autonomous weapons systems. The company said these exceptions had “not affected a single government mission to date.”

“No amount of intimidation or punishment from the Department of War will change our position,” Anthropic stated, adding it would challenge the supply-chain designation in court — calling it “an unprecedented action never before publicly applied to an American company.”

Industry solidarity

The dispute has produced an unusual show of unity in Silicon Valley. Nearly 500 employees from OpenAI and Google signed an open letter stating “we will not be divided,” warning that the Pentagon was trying to isolate each company individually.

OpenAI CEO Sam Altman publicly confirmed his company holds the same red lines as Anthropic, even as OpenAI signed its own Pentagon deal hours later.

Looking forward

The six-month transition period suggests the Pentagon recognises that removing Anthropic from its operations is far from straightforward. Whether this confrontation reshapes how the US government contracts with AI companies — or whether commercial pressure eventually forces compliance — remains an open question.