Altman and Musk were OpenAI’s founding co-chairs in 2015, but their relationship has devolved into name-calling and lawsuits.

During Donald Trump's January 20 inauguration, fans couldn't help but notice how Mark Zuckerberg, Jeff Bezos and Elon Musk had a better view of the festivities over people who will be working for the president.

OpenAI CEO Sam Altman called Stargate, “the most important project for this era” and promised that all of the new investment his company was making would help cure diseases. Altman was actually prompted by Trump to talk about the medical advances that AI would supposedly figure out.

As Elon Musk and his billionaire brethren take power in Trump’s second term, the lack of legal guardrails — and the fading power of Big Media — is becoming an existential crisis.

Jamie Dimon, the billionaire head of the U.S.’ biggest bank, lauded Tesla CEO Elon Musk, the richest man on the planet and a key part of President Donald Trump’s administration, this week, putting an end to years of head-butting between the billionaires’ companies as Dimon becomes the latest billionaire warming to Musk or Trump.

It was an eye-popping crack in the Donald/Elon bromance, which is being watched closely now that Trump has given Musk the power to roam the West Wing, where he is working out of an office on the second floor, and take a hatchet to government.

Mr. Bruni is a contributing Opinion writer. Ms. McLean is a contributing editor at Business Insider and an author of “The Smartest Guys in the Room,” a book about the collapse of Enron. Mr. Silver is the author of “On the Edge: The Art of Risking Everything.”

Tech billionaire Marc Andreessen pointed to the New Deal as Roosevelt’s “personal monarchy.” We need a Caesar-like CEO in Trump, he said, to undo FDR’s grasp. Given the upper crust’s ...

The assembly of billionaires at Trump's inauguration was a display of wealth and power unlike any before. The display was all the more remarkable given how recently many in tech were politically naive or apathetic.

The U.S. Securities and Exchange Commission has sued billionaire Elon Musk, saying he failed to disclose his ownership of Twitter stock in a timely manner in early 2022, before buying the social ...

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Burning embers swirl as crews work to contain the Hughes Fire in Castaic, Calif., on Wednesday. (Gina Ferazzi/Los Angeles Times via Getty Images)