Microsoft was once the exclusive provider of data center infrastructure for OpenAI to train and run its AI models. No longer. Coinciding with the announcement of Stargate, OpenAI’s massive new AI infrastructure deal with SoftBank, Oracle, and others, Microsoft says it has signed a new agreement with OpenAI that gives it “right of first refusal” on new OpenAI cloud computing capacity. That means that, going forward, Microsoft gets first choice over whether to host OpenAI’s AI workloads in the cloud — but if Microsoft can’t meet its needs, OpenAI can go to a rival cloud provider.