Microsoft’s chief executive, Satya Nadella, has said that Google should have been the “default winner” in A.I. At the DealBook Summit, Pichai responded, “I would love to do a side-by-side comparison ...

Now, a new artificial intelligence tool from DeepMind, a Google company in London that develops A.I. applications, has smashed through the old barriers and achieved what its makers call unmatched ...