Over the weekend, OpenAI unexpectedly terminated CEO Sam Altman, and removed Greg Brockman from its board. Microsoft, who is partnered with OpenAI, quickly hired both to lead a new advanced AI research team, with Microsoft CEO Satya Nadella announcing on X, “And we’re extremely excited to share the news that Sam Altman and Greg Brockman, together with colleagues, will be joining Microsoft to lead a new advanced AI research team.”

As a result of the events over the past weekend, dozens of OpenAI employees have already quit, and 505 of 700 OpenAI employees signed a letter requesting that all current board members resign, or they would accept positions offered by Microsoft’s new subsidiary run by Altman and Brockman.

OpenAI interim CEO Emmett Shear announced he would investigate the decisions by the board leading to the current situation, writing on X that he plans to “Hire an independent investigator to dig into the entire process leading up to this point and generate a full report.”