This is the best summary I could come up with:

But in 2018, two things happened: First, Musk quit the board of OpenAI after he said he invested $50 million, cutting the then-unknown company off from more of the entrepreneur's crucial financial backing.

And secondly, OpenAI's leaders grew increasingly aware that developing and maintaining advanced artificial intelligence models required an immense amount of computing power, which was incredibly expensive.

Yet the nonprofit's board and mission still governed the company, creating two competing tribes within OpenAI: adherents to the serve-humanity-and-not-shareholders credo and those who subscribed to the more traditional Silicon Valley modus operandi of using investor money to release consumer products into the world as rapidly as possible in hopes of cornering a market and becoming an industry pacesetter.

When OpenAI kicked off a seismic shift in the tech industry with its launch of ChatGPT last year, the company's most prominent investor, Microsoft, greatly increased its financial stake.

"We implore you, the Board of Directors, to remain steadfast in your commitment to OpenAI's original mission and not succumb to the pressures of profit-driven interests," the letter states.

But success in Silicon Valley almost always requires massive scale and the concentration of power — something that allowed OpenAI's biggest funder, Microsoft, to become one of the most valuable companies in the world.

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