Microsoft is threatening to sue OpenAI and Amazon over their $50 billion deal, claiming it violates Azure's exclusive API rights. The dispute hinges on a "stateful vs. stateless" technicality, while Microsoft - OpenAI's largest shareholder - pushes back hard.

Microsoft is reportedly considering legal action against Amazon and OpenAI over a whopping $50 billion partnership signed between the two companies last month. This deal, Microsoft alleges, blatantly violates its exclusive cloud computing agreement with the ChatGPT maker.

The dispute centres on whether Amazon Web Services can host OpenAI's new commercial product, Frontier, without violating a long-standing agreement that requires all access to OpenAI's models to flow through Microsoft's Azure platform.

Stateless vs. Stateful Loophole

When Microsoft restructured its historic partnership with OpenAI in late 2025, it retained one ironclad clause - all basic, 'stateless' API calls to OpenAI's models must be routed exclusively through Microsoft Azure.