After DeepSeek Upended the Market, Is It Worth Investing in A.I.?

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.

What is DeepSeek? And How Is It Upending A.I.?

How did a little-known Chinese start-up cause the markets and U.S. tech giants to quake? Here’s what to know.

Inside Mark Zuckerberg’s Sprint to Remake Meta for the Trump Era

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.

Tech Industry and CEOs Curry Favor With Trump Ahead of His Inauguration 

It was a week of frenzied activity, as Silicon Valley billionaires and their companies brandished checks and compliments for the President-elect.

As Election Looms, Disinformation ‘Has Never Been Worse’

A torrent of falsehoods, from home and abroad, have undermined what was once a shared faith in the honesty of America’s democracy.

Telegram Founder Pavel Durov’s Indictment Thrusts Encryption Into the Spotlight

The criminal charges against Pavel Durov, Telegram’s founder, raised concerns in Silicon Valley about encryption and the app’s approach to privacy and security.