Microsoft and OpenAI did not break up. They did something more important: they rewrote the contract that shaped the last phase of the AI market. The reset started when OpenAI completed its October 2025 recapitalization into a public benefit corporation, with Microsoft holding roughly 27 percent of OpenAI Group on an as-converted diluted basis, valued at about $135 billion, and OpenAI separately confirming that ownership mix in its structure page. That was the ownership reset. This week's amended agreement is the operating reset.
The core shift is simple. Microsoft keeps unusually strong rights into the next decade, but OpenAI is no longer locked into the kind of one-cloud dependence that defined the partnership's earlier years. Under the new terms, Microsoft remains OpenAI's primary cloud partner and OpenAI products still ship first on Azure, unless Microsoft cannot or chooses not to support required capabilities. But OpenAI can now serve products across other cloud providers too.
Why it matters: This is not a clean separation. It is a controlled loosening of one of the tightest commercial relationships in AI, which gives OpenAI more bargaining power without stripping Microsoft of its platform advantage.
What Microsoft kept
The most overlooked part of the deal is how much Microsoft still controls. In the October 2025 agreement, Microsoft retained exclusive IP rights and Azure API exclusivity until AGI. It also secured rights to OpenAI models and products through 2032, while research IP rights run until either an independent expert panel verifies AGI or 2030, whichever comes first. in SEC filings.






