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.

OpenAI's board chairman said it has unanimously rejected an Elon Musk-led offer to buy the artificial intelligence company ...

OpenAI has firmly declined a $97.4 billion acquisition proposal from a consortium led by Elon Musk, stating unequivocally that the organization is not for sale. The board’s unanimous decision ...