OpenAI was in open revolt on Monday with more than 600 employees signing an open letter threatening to leave unless the board resigns and reinstates Sam Altman as CEO, along with cofounder and former president Greg Brockman. “The process through which you terminated Sam Altman and removed Greg Brockman from the board has jeopardized all of this work and undermined our mission and company,” the letter reads. “Your conduct has made it clear you did not have the competence to oversee OpenAI.”