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, led by Sam Altman, above, said Elon Musk had argued in a lawsuit that the assets of the nonprofit that controls the company could not be transferred to another entity for public gain.
The Chinese start-up used several technological tricks, including a method called “mixture of experts,” to significantly reduce the cost of building the technology.