The Endeavor CEO was enlisted to join investors who put in an unsolicited offer to buy OpenAI's majority share of its for-profit arm.

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Despite having rarely left the president’s side over the preceding few months, Musk was blindsided by the announcement, according to people familiar with the matter. Musk fumed ...

Elon Musk's unsolicited move is his latest attempt to stop the startup he co-founded with Sam Altman — but later left — from going for-profit as it seeks more funding to stay ahead in AI race ...