Mr. Trump called Jensen Huang, Nvidia’s chief executive, while Mr. Huang was onstage in Los Angeles and criticized calls to slow down and regulate A.I.

Six giant investment firms announced a $500 billion effort to raise money for customers of Nvidia to pay for computing power.

Anthropic and OpenAI are clashing with the rest of the tech industry over whether “open-source” models from China should be freely available or restricted.

They make much of the gear that goes into giant data centers. Demand for their products is shifting the balance of tech power.