The Defense Department alledgedly experimented with OpenAI models through Microsoft even when the company’s policies prohibited military use.

Sources allege the Defense Department experimented with Microsoft’s version of OpenAI technology before the ChatGPT-maker lifted its prohibition on military applications.

Pre-trial motions in Elon Musk's lawsuit against OpenAI and Microsoft focus in part on his company's business dealings with the Redmond company, and what that means for his credibility as a witness.

Since 2019, Microsoft and OpenAI have worked together to advance artificial intelligence responsibly and make its benefits broadly accessible. What began as a research partnership has grown into one of the most consequential collaborations in technology — grounded in mutual trust,

Microsoft and OpenAI officially clarified their long-term partnership agreements following Amazon's massive $50 billion investment and new AWS cloud deal.

OpenAI is developing a GitHub rival, raising questions about its partnership with Microsoft and the future of developer tools.

OpenAI is developing an alternative to GitHub, Microsoft’s popular code repository that lets software engineers store, share and collaborate on computer code, according to a person with knowledge of the project.

OpenAI's $110B funding includes AWS as the exclusive third-party distributor for the Frontier agent platform, introducing an architectural split: Azure retains stateless API exclusivity; AWS gains stateful runtime environments via Bedrock.