The people who were most afraid of the risks of artificial intelligence decided they should be the ones to build it. Then distrust fueled a spiraling competition.
Lawmakers and Sam Altman, the chief executive of OpenAI, agreed that artificial intelligence should be regulated. How to do that remains an open question.
A rival chatbot has shaken Google out of its routine, with the founders who left three years ago re-engaging and more than 20 A.I. projects in the works.