Pentagon Pressures Anthropic Over Military AI Use, Legal Dispute Follows

The U.S. Department of Defense and AI company Anthropic became involved in a contract dispute after the Pentagon sought broader access to Anthropic’s Claude AI model for military applications.

Emil Michael, who became Under Secretary of Defense for Research and Engineering in August 2025, took responsibility for the military’s artificial intelligence portfolio. He viewed Anthropic’s restrictions on Claude—specifically its bans on mass surveillance and fully autonomous weapons—as not meeting military requirements. The Pentagon responded by requiring Anthropic and other AI providers to permit their technology’s use for all lawful military purposes.

Anthropic did not accept these terms, stating that Claude was not reliable enough for use in mass surveillance or fully autonomous weapon systems. The company maintained that its ethical guidelines were intended to prevent such uses, and it communicated these concerns during negotiations with the Pentagon.

In February 2026, Defense Secretary Pete Hegseth gave Anthropic a deadline to agree to unrestricted military use of Claude. The department stated that failure to comply could result in contract cancellation, designation as a supply chain risk, or the invocation of the Defense Production Act. Anthropic later stated that negotiations had made little progress and that the Pentagon’s final offer did not address its core concerns.

What the numbers show

• Emil Michael assumed oversight of military AI in August 2025
• The Pentagon set a compliance deadline for Anthropic in February 2026
• Anthropic filed lawsuits in federal courts following the dispute

After the deadline passed, Anthropic initiated legal action in federal courts. The lawsuits sought to reverse the Pentagon’s supply chain risk designation and to block an order from the Trump administration that would halt federal use of the Claude AI model. These court filings marked a shift of the dispute from contract negotiations to the legal system.

Microsoft and a group of retired U.S. military leaders entered the legal process by submitting briefs in support of Anthropic’s position. Their filings opposed the Pentagon’s supply chain risk designation and called for reconsideration of the restrictions placed on Anthropic’s technology.

Emil Michael stated that he does not believe negotiations between the Pentagon and Anthropic will resume. This position indicated that the department does not expect further contract discussions with the company regarding the use of Claude.

Industry reaction

Microsoft and several retired military leaders filed legal briefs supporting Anthropic’s challenge to the Pentagon’s designation of the company as a supply chain risk. Their filings were submitted as part of the ongoing federal court proceedings.

Anthropic maintained its position in court, seeking to reverse the Pentagon’s actions and to prevent the federal government from discontinuing use of its Claude AI model, according to court records and company statements.

* This article is based on publicly available information at the time of writing.