Wired reports that more than 730 OpenAI employees — about 95 percent of the company — signed an open letter threatening to resign unless the board stepped down and reinstated Sam Altman as CEO alongside Greg Brockman, days after the board fired Altman. Chief scientist Ilya Sutskever, blamed for the ouster and a letter signatory himself, wrote on X that he deeply regretted his role, while Microsoft CEO Satya Nadella said Altman and Brockman would head a new advanced AI research unit there.