Hours after the artificial intelligence pioneer Geoffrey Hinton won a Nobel Prize in physics, he drove a rented car to Google’s California headquarters to celebrate.

Google has rolled out a retooled search engine that will frequently favor responses crafted by artificial intelligence over website links.

Google took its next leap in artificial intelligence Wednesday with the launch of project Gemini, an AI model trained to behave in human-like ways that’s likely to intensify the debate about the technology’s potential promise and perils.