After the arrival of a less costly A.I. model from China, U.S. markets and academics are wrestling with the ultimate economic value of the technology.

An apparent breakthrough in efficiency from the Chinese start-up did not make tech’s biggest companies question their extravagant spending on new data centers.

The owner of Facebook and Instagram is incorporated in Delaware, but is considering a change. Its corporate headquarters would remain in Silicon Valley, people with knowledge of the matter said.

In a meeting with Meta employees on Thursday, Mr. Zuckerberg also doubled down on recent changes to the company’s online speech policies and ending its diversity initiatives.

As Mark Zuckerberg and other tech titans have embraced President Trump and muffled internal dissent at their companies, their mostly left-leaning employees have objected with subtle acts of defiance.

The Silicon Valley giant was criticized for giving away its core A.I. technology two years ago for anyone to use. Now that bet is having an impact.

President Trump had sued Meta and other tech firms in 2021, arguing that he had been wrongfully censored by them. Meta also reported revenue and profit growth for the fourth quarter.

The fast-growing popularity of the Chinese artificial intelligence software hit shares in tech giants like Nvidia, as Silicon Valley worried about what comes next.

Much of the capital investment, a big jump from 2024, will fund expansion of Meta’s data centers, which provide the computing power needed by A.I. products and algorithms.

Some posts related to obtaining abortion pills were recently hidden on Instagram and Facebook and some accounts were suspended, before being later restored.

In a wide-ranging interview, Xavier Becerra, President Biden’s health secretary, defended his tenure and hinted that he might run for governor of California.

A new report details how a covert influence operation linked to the Kremlin continued to place ads on Facebook despite U.S. and E.U. prohibitions on doing business with the organization.

“This is truly one of the funniest and most unexpected stories of the young year so far.”

Meta’s Instagram and Google’s YouTube are getting ready to welcome TikTok users, as the Supreme Court upheld a law that effectively bans the Chinese-owned app from the United States.

Mark Zuckerberg, the Meta chief executive, is one of several tech leaders expected to play a high-profile role in celebrating the new administration next week.

The layoffs come as Mark Zuckerberg pushes to remake his company for the Trump era and prepares to co-host a gala for the president-elect’s inauguration.

Responding to a question from a reporter, the president said he believed Americans “want to tell the truth.”

After visiting President-elect Donald J. Trump in November, Mr. Zuckerberg decided to relax Meta’s speech policies. He asked a small team to carry out his goals within weeks. The repercussions are just beginning.

“I think this set of changes that the company announced this week are the most important series of policy changes that they have made in the past five years.”

Meta is joining X and YouTube in shifting moderation to users. Are you ready?