This is stated in a release on the company's website.
"Altman... will rejoin OpenAI's board of directors," the statement said.
In addition, the board of directors will include former Bill and Melinda Gates Foundation CEO Sue Desmond-Hellman, former Sony Corporation executive vice president Nicole Seligman, and Instacart CEO Fiji Simo.
On November 20, information appeared that American entrepreneur and programmer Sam Altman got a job at Microsoft after being fired from OpenAI.
Altman's resignation as CEO of OpenAI became known on November 17.
The company noted that he was not frank in his communications with the board of directors - and this prevented him from fulfilling his duties.