Synopsis:

OpenAI co-founder Sam Altman will return as boss just days after he was fired by the board, the firm has said.

The agreement “in principle” involves new board members being appointed, the tech company added.

Mr Altman’s sacking on Friday astonished industry watchers and led to staff threatening mass resignations unless he was reinstated.

“I am looking forward to returning to OpenAI,” Mr Altman said in a post on X, formerly Twitter.

He added: "I love OpenAI, and everything I’ve done over the past few days has been in service of keeping this team and its mission together.