A federal judge issued a landmark ruling last year, saying that Google had become a monopolist in internet search. But in a hearing that began last week to figure out how to fix the problem, the emphasis has frequently landed on a different technology, artificial intelligence. In U.S. District Court in Washington last week, a Justice Department lawyer argued that Google could use its search monopoly to become the dominant player in A.I. Google executives disclosed internal discussions about expanding the reach of Gemini, the company’s A.I. chatbot. And executives at rival A.I. companies said that Google’s power was an obstacle to their success. On Wednesday, the first substantial question posed to Google’s chief executive, Sundar Pichai, after he took the stand was also about A.I. Throughout his 90-minute testimony, the subject came up more than two dozen times. “I think it’s one of the most dynamic moments in the industry,” said Mr. Pichai. “I’ve seen users’ home screens with, like, seven to nine applications of chatbots which they are trying and playing and training with.”

Full commentary : A landmark antitrust lawsuit against Google about the past has turned into a fight about the AI future.