This is the best summary I could come up with:

Satya Nadella, Microsoft’s chief executive, said on X that he was “encouraged by the changes to OpenAI board,” calling it a “first essential step on a path to more stable, well-informed, and effective governance.”

A person close to the board’s deliberations on Tuesday said that Mr. D’Angelo, Tasha McCauley and Helen Toner pressed for certain concessions from Mr. Altman, including an independent investigation into his leadership of OpenAI.

The ouster kicked off efforts by Mr. Altman, 38, his allies in the tech industry and OpenAI’s employees to force the company’s board to bring him back.

But in a head-spinning development just hours later, Microsoft said that Mr. Altman, Mr. Brockman and others would be joining the company to start a new advanced artificial intelligence lab.

Most of OpenAI’s more than 700 employees signed a letter telling the board they would walk out and follow Mr. Altman to Microsoft if he wasn’t reinstated, putting the future of the start-up in jeopardy.

Four board members — Ilya Sutskever, an OpenAI founder; Mr. D’Angelo; Ms. Toner, a director of strategy at Georgetown’s Center for Security and Emerging Technology; and Ms. McCauley, an entrepreneur and computer scientist — had initially decided to push Mr. Altman out.

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