Bret Taylor, the chairman of OpenAI’s board, said the artificial intelligence company was “not for sale.” Mr. Musk is separately raising money for his A.I. start-up, xAI.

OpenAI’s board of directors has responded to Elon Musk’s bid to buy the company. In a statement on X, OpenAI chair Bret Taylor said, “OpenAI is not for sale, and the board has unanimously rejected Mr. Musk’s latest attempt to disrupt his competition.”

In a short letter to Musk's lawyer on Friday, OpenAI's attorney, William Savitt, said the OpenAI board had reviewed the proposal and determined that the billionaire's "much-public