Silicon Valley engineers recently flocked to new technology from a Chinese company, Z.ai, that is almost as good as its American competitors but much cheaper.

A recent episode underscored the Trump administration’s increasing reliance on advanced A.I. systems for cybersecurity even as it battles a leading U.S. developer.

Silicon Valley and corporate America are increasingly turning to cheaper, open-source artificial intelligence models built in China.

Workers at the artificial intelligence company have been puzzled and increasingly concerned by the administration’s move to limit their latest A.I. models.

The administration’s surprise restrictions Friday cut off foreign access to Anthropic’s latest models and sparked another round of finger pointing.

Rampant enthusiasm is buoying tech shares to levels that defy gravity. Invest with caution, our columnist says.

The San Francisco company said on Friday night that the federal government ordered the suspension of the two A.I. systems, citing national security concerns.

Strong investor interest in SpaceX could be good news for the A.I. rivals, which have signaled that they, too, intend to go public this year.

Two Times tech reporters and their editor talk about assessing the sky-high valuation of the rocket and satellite maker, the potential economic impact of its public debut and the role of the world’s richest man in it all.

President Trump touched on what is an increasingly hot topic in Washington: how average Americans can get a piece of the tech industry’s A.I. windfall.

In the race to dominate the artificial intelligence industry, companies like SpaceX and Alphabet are borrowing cash and raising equity from investors at the fastest pace in decades.

Called Claude Fable 5, it is twice as expensive as the company’s previous flagship system.

Outside groups have spent roughly $12 million to support or oppose Mr. Bores’s campaign for a House seat in Manhattan, elevating his name in a crowded race.

The artificial intelligence company, which is racing rival OpenAI to the stock market, has seen explosive growth over the last year thanks largely to technology that can automatically write computer code.

One is allied with Anthropic. The other is tied to OpenAI. They’re both spending millions to influence the midterms, and they’re leaving a trail of fearful candidates and canceled ads in their wake.

Pope Leo XIV’s spiritual message on artificial intelligence arrived as Silicon Valley’s A.I. enthusiasts pursue their own spirituality through technology.

The co-founder of a prominent A.I. company was nearby as the pope implored A.I. leaders to slow down and consider the technology’s possible perils.

The co-founder of a prominent A.I. company was nearby as the pope implored A.I. leaders to slow down and consider the technology’s possible perils.

In his letter, the first American pontiff called for putting care for humans at the heart of technological change.

The American pope wants to take artificial intelligence down a notch. Is he challenging the tech companies, or will tech take over the papacy?

The government’s A.I. Security Institute, staffed by alumni from OpenAI and Google, is becoming a model for countries grappling with A.I.’s emerging risks.

Demand for security engineers has surged as artificial intelligence generates a glut of new code and models like Anthropic’s Mythos create new concerns.

The latest artificial intelligence models from Anthropic and OpenAI are extending the United States’ lead over China and intensifying the rivalry between the countries.

The Trump administration, which took a noninterventionist approach to artificial intelligence, is now discussing imposing oversight on A.I. models before they are made publicly available.

The agreements with the technology companies come amid the Defense Department’s dispute with Anthropic.

Chris Larsen, who hails from California, plans to spend $3.5 million to help Alex Bores, a New York congressional candidate at the center of a proxy war over A.I. regulation.

Cohere is acquiring Aleph Alpha in a deal aimed at customers uneasy about the dominance of American companies in artificial intelligence.

Mr. Altman, who has faced criticism over OpenAI’s direction, has culled company projects and is trying to be more disciplined with strategy.

The maker of ChatGPT is taking a more open approach to cybersecurity than its chief rival, Anthropic.

Artificial intelligence tools are making it faster than ever to reproduce creative work. Does copyright even matter anymore?