A sale of insider shares at $421 a share would make Mr. Musk’s rocket company the most valuable private company in the world, as it readies for a possible initial public offering next year.

© Meridith Kohut for The New York Times

A new technology release from OpenAI is supposed to top what Google recently produced. It also shows OpenAI is engaged in a new and more difficult competition.

© Aaron Wojack for The New York Times

The deal is a watershed for Hollywood, which has been trying to sort through the possible harms and upsides of generative artificial intelligence.

© Philip Cheung for The New York Times

Shares in the technology company are down as investors grow anxious that its bet on artificial intelligence, and OpenAI in particular, may not pay off.

© Haiyun Jiang for The New York Times

Faith is not meant to be transactional or tailored to you.

Artificial intelligence is unpopular and uncool — so A.I. companies are making ads that don’t even bother to show their own products. Will it pay off?

Although some Silicon Valley executives paint China as the enemy, Chinese brains continue to play a major role in U.S. research.