Anthropic chief executive Dario Amodei has said the company has "no choice" but to challenge in court the Pentagon's formal designation of the artificial intelligence firm as a risk to US national security.

Anthropic PBC vowed to legally contest a Pentagon decision to declare the company a threat to the U.S .supply chain under an authority normally reserved for foreign adversaries, escalating a showdown with the Trump administration over artificial intelligence safeguards.

Microsoft is the first major company to say it will keep using Anthropic models in its products.

Anthropic’s moral stand on U.S. military use of artificial intelligence is reshaping the competition between leading AI companies but also exposing a growing awareness that maybe chatbots just aren’t capable enough for acts of war.

Amodei circulated a 1,600-word memo to staff on Friday explaining why talks with the Department of War collapsed.

Anthropic CEO Dario Amodei is reportedly back at the negotiating table with the U.S. Department of Defense after the breakdown of talks on Friday.

Swapping out one AI model on a classified network for another takes minutes. Retraining the people who’ve learned to rely on it will take much longer

Anthropic’s banned Claude AI was reportedly used in the Iran war, even after Washington ordered federal agencies to phase out the system across the government.