OpenAI was in open revolt on Monday with 490 employees threatening to leave unless the board resigns and reinstates Sam Altman as CEO, along with cofounder and former president Greg Brockman. Altman was controversially fired by the board on Friday. From a report: “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.” Remarkably, the letter’s signees include Ilya Sutskever, the company’s chief scientist and a member of its board, who has been blamed for coordinating the boardroom coup against Altman in the first place.

Shortly before the letter was released, Sutskever posted on X: “I deeply regret my participation in the board’s actions. I never intended to harm OpenAI. I love everything we’ve built together and I will do everything I can to reunite the company.” The letter’s release follows an extraordinary, head-spinning weekend in Silicon Valley. OpenAI’s board removed Altman from his position on Friday, claiming “he was not consistently candid in his communications with the board, hindering its ability to exercise its responsibilities.”