Microsoft and Nvidia Take a Quieter Approach to Trump

Other big technology companies have been boisterous in their courtship of the new administration. But Nvidia and Microsoft have avoided the Washington spotlight.

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.

Three Mile Island Is at the Center of Efforts to Expand Nuclear Capacity to Meet Rising Power Demand

The Pennsylvania plant, site of the worst U.S. nuclear energy accident, is at the forefront of efforts to expand nuclear capacity to meet rising electricity demand.

Microsoft and OpenAI’s Close Partnership Shows Signs of Fraying

The “best bromance in tech” has had a reality check as OpenAI has tried to change its deal with Microsoft and the software maker has tried to hedge its bet on the start-up.

Behind OpenAI’s Audacious Plan to Make A.I. Flow Like Electricity

Sam Altman, OpenAI’s chief executive, is talking to the United Arab Emirates, Asian chipmakers and U.S. officials to expand the computing power needed to build artificial intelligence.