The answer to your question is in the public releases. MS went from primary partner (under ROFR) to one of the options. They retain IP rights and API hosting, although in recent weeks we learned that OpenAI was planning a workaround with AWS and Microsoft said they might sue them for that. So the happy marriage is over, it’s more like a custody battle now: https://www.reuters.com/technology/microsoft-weighs-legal-ac...