This is the best summary I could come up with:

Initially cast as a clash over the safe development of artificial intelligence, Altman’s firing was at least partially motivated by the sense that his behavior would make it impossible for the board to oversee the CEO.

Altman was reinstated as CEO five days later, after employees released a letter signed by a large percentage of OpenAI’s 800-person staff, including most senior managers, and threatening mass resignations.

Within hours, messages dismissed the board as illegitimate and decried Altman’s firing as a coup by OpenAI co-founder and chief scientist Ilya Sutskever, according to the people.

For longtime employees, there was added incentive to sign: Altman’s departure jeopardized an investment deal that would allow them to sell their stock back to OpenAI, cashing out equity without waiting for the company to go public.

As the company seeks to rebuild the board and smooth things over with Microsoft, its majority shareholder, it has committed to launching an internal investigation into the debacle, which broke into public view on the Friday before Thanksgiving.

“There have been a lot of wild and inaccurate reports about what happened with the Board but the bottom line is that Ilya has very publicly stated that Sam is the right person to lead OpenAI and he is thrilled that he is back at the helm," Sutskever’s lawyer, Alex Weingarten, chair of the litigation practice at Willkie Farr & Gallagher, wrote in a statement.

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