Negotiations between the Pentagon and the AI company Anthropic were severely complicated on Friday when President Donald Trump announced on Truth Social that the government would stop utilizing the company’s tech. The president ordered the Pentagon to begin a six-month phase-out, accusing Anthropic of being run by "Leftwing nut jobs."
The Truth Social post said that Anthropic wanted the government to abide by its terms of service.
"THE UNITED STATES OF AMERICA WILL NEVER ALLOW A RADICAL LEFT, WOKE COMPANY TO DICTATE HOW OUR GREAT MILITARY FIGHTS AND WINS WARS!,” Trump wrote. “That decision belongs to YOUR COMMANDER-IN-CHIEF, and the tremendous leaders I appoint to run our Military. The Leftwing nut jobs at Anthropic have made a DISASTROUS MISTAKE trying to STRONG-ARM the Department of War, and force them to obey their Terms of Service instead of our Constitution."
The federal government and Anthropic have been at odds for weeks as they tried to hammer out an agreement on how the military can use Claude, Anthropic’s AI model. Anthropic CEO Dario Amodei has been firm that he will not allow the Pentagon to use Claude for mass surveillance of Americans or to create autonomous weapons, like pilotless drones.
The government reportedly agreed to those terms, according to the New York Times, but the contract's legal language provided too much wiggle room for Anthropic’s comfort. Anthropic is known for taking a more cautious approach to AI development, and its founders famously left OpenAI over AI safety concerns.
On Thursday, Amodei explained his stance in a blog post:
"Anthropic understands that the Department of War, not private companies, makes military decisions. We have never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner.
However, in a narrow set of cases, we believe AI can undermine, rather than defend, democratic values. Some uses are also simply outside the bounds of what today’s technology can safely and reliably do."
A deadline of Friday evening was set for an agreement between the Pentagon and Anthropic. It’s not clear if Trump’s announcement of a phase-out will equate to more time for negotiation or if the government is truly moving forward with firing Anthropic by declaring it a supply chain risk. The government may also seek to compel Anthropic to agree to its terms through the Defense Production Act, according to the Times. The government may also choose another AI partner, like Elon Musk's Grok, but CIA officials believe that product is inferior to Anthropic's, the Times reports.
Following the president's Friday afternoon announcement, OpenAI CEO Sam Altman appeared on CNBC and voiced support for Anthropic. "For all the differences I have with Anthropic, I mostly trust them as a company and I think they really do care about safety, and I’ve been happy that they’ve been supporting our war fighters," Altman said, according to a clip of the appearance posted to X.
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Meanwhile, dozens of employees at Google and OpenAI, both competitors of Anthropic, signed letters backing Amodei’s stances. And outside Anthropic’s San Francisco headquarters, words of support appeared in chalk on the sidewalk, according to a post on X.
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This week, Anthropic softened its safety policy — often viewed as one of the strongest in Silicon Valley — citing competitors' reluctance to do the same and the federal government’s disinterest in prioritizing security.
"The policy environment has shifted toward prioritizing AI competitiveness and economic growth, while safety-oriented discussions have yet to gain meaningful traction at the federal level," the company wrote. "We remain convinced that effective government engagement on AI safety is both necessary and achievable, and we aim to continue advancing a conversation grounded in evidence, national security interests, economic competitiveness, and public trust. But this is proving to be a long-term project—not something that is happening organically as AI becomes more capable or crosses certain thresholds."
Disclosure: Ziff Davis, Mashable’s parent company, in April 2025 filed a lawsuit against OpenAI, alleging it infringed Ziff Davis copyrights in training and operating its AI systems.