Microsoft will no longer be the exclusive provider of new cloud computing capacity to OpenAI — a new twist in their relationship that clears the way for OpenAI to work with Oracle and others on the $500 billion Stargate AI project announced by the companies Tuesday with President Trump at the White House.

Microsoft is OpenAI's largest investor, with a 49% stake, translating to $14 billion. As part of its complicated partnership with the ChatGPT maker, Microsoft was once the exclusive cloud computing partner for OpenAI. However, OpenAI's $500 billion investment in computing infrastructure changes its relationship with Microsoft.

The Stargate project, a landmark US$500 billion joint venture announced by US President Donald Trump in early 2025, has exposed growing tensions between OpenAI and Microsoft. While initially co-developed by the two companies,