A central issue in the negotiations is determining how much equity Microsoft will receive in the restructured OpenAI in exchange for its $13bn investment.

Microsoft stock rose on Monday after a report that the company was revising the terms of its partnership with OpenAI to allow the ChatGPT maker to launch an initial public offering.The companies also are rewriting the terms of a wider contract that was drafted when Microsoft and OpenAI first unveiled an exclusive partnership in 2019,

As OpenAI eyes a public offering, discussions with Microsoft focus on future technology access and investment structures.