Microsoft became the first major company to support Anthropic in its conflict with the Pentagon.

Microsoft Supports Anthropic in Conflict with the Pentagon

*Microsoft became the first major technology company to openly support startup Anthropic in a dispute with the U.S. Department of Defense (Pentagon) over the military use of AI models.*

What Happened
1. Anthropic’s Refusal

The startup declined to grant the Pentagon unrestricted rights to use its Claude model.

2. Government Decision

In response, the Pentagon placed Anthropic on a blacklist of suppliers deemed a supply‑chain threat. The presidential administration demanded that the Claude chatbot be discontinued in all federal agencies.

3. Lawsuit by Anthropic

The company sued the Trump administration, calling the government’s actions “unprecedented and unlawful” and asserting that they cause irreparable damage to contracts worth hundreds of millions of dollars.

How Microsoft Responded
What Microsoft Said Why It Matters
Temporary ban – a request to suspend enforcement of the Defense Department’s decision pending review of the lawsuit. Prevent costly disruptions for suppliers who would have to rapidly retool products dependent on Anthropic technologies. Encourage dialogue – a call not to take “radical” steps that could negatively affect the entire U.S. technology industry. Protect industry interests and support supply‑chain stability. Focus on lawful applications – AI should be used only within legal frameworks and proper safeguards. Prevent use of AI for mass surveillance or autonomous combat operations without human oversight. Transition period – the Pentagon plans six months to gradually phase out Anthropic technologies but does not provide a similar timeframe for contractors. Microsoft stresses the need for equal conditions and warns of potential disruptions in military systems.

Outcomes
Microsoft expressed its position through an Amicus Curiae (friend‑of‑the‑court) brief filed with the U.S. District Court in San Francisco. Such documents give external experts the opportunity to influence a decision even if they are not direct parties to the case.

The main goal of Microsoft is to ensure a more orderly transition away from Anthropic technologies, protect military interests, and guarantee that AI is used only in accordance with law and ethical principles.