The announcement capped a tumultuous weekend for OpenAI, after Mr. Altman made a push to reclaim his job as C.E.O. of the artificial intelligence company.
The tech giant moved quickly to hire Sam Altman and others after their abrupt departures from OpenAI, a key Microsoft partner, which had rattled the company’s investors.
Big Tech is reeling from the ouster of Sam Altman at a leading A.I. start-up and his subsequent jump to Microsoft, moves that reset the power dynamic underpinning the sector.