“The key part of the deal means that Microsoft is the exclusive cloud partner for OpenAI, and Microsoft’s cloud services will power all OpenAI workloads across products, API services, and research.”
Microsoft won’t say how much it put in. Reports put it at $10 billion. The money comes back as Azure spend, since every OpenAI workload now has to run on Microsoft’s cloud. Satya Nadella calls it democratizing AI, and the only door in is Azure.