Altman's sudden move to join Microsoft is not finalized, Satya Nadella, CEO of Microsoft, signaled in an interview with CNBC on Monday. A person familiar with the matter said he would only return to OpenAI if the board members who ousted him stepped down. In the CNBC interview on Monday afternoon, Nadella sought to assure customers and investors that his company was on solid ground no matter the outcome. He left the door open for Altman to return to OpenAI or continue on as an AI leader at Microsoft, even though he announced late Sunday night that Altman was coming to Microsoft. "I'm open to both options," Nadella said in the interview with CNBC.