Mira Murati will be the interim CEO.

Sam Altman has been fired as CEO of OpenAI, the company announced on Friday.

“Mr. Altman’s departure follows a deliberative review process by the board, which concluded that he was not consistently candid in his communications with the board, hindering its ability to exercise its responsibilities,” the company said in its blog post.

EDITED TO ADD direct link to OpenAI board announcement:
https://openai.com/blog/openai-announces-leadership-transition