The company answered the billionaire’s offer in a legal filing, accusing him of hypocrisy.

The billionaire is leading a group of investors in the unsolicited offer, which complicates the start-up’s plan to raise more money.

The tech mogul is unlikely to win. But his goal may be more about making life difficult for the A.I. start-up and its leader, Sam Altman.

After helping President Trump get elected, Elon Musk was poised to dominate the country’s A.I. policies. Then Mr. Altman sneaked into the White House.

The Japanese conglomerate SoftBank would invest up to $40 billion in the maker of the chatbot ChatGPT.

A new investment from the Japanese conglomerate would be separate from the $100 billion tied to a project announced at the White House last week.

The second Trump White House is starting out with a remarkable degree of conflict among different individuals, constituencies and worldviews.