Alphabet Inc.'s Google is concentrating its artificial intelligence leadership at its Mountain View, California, headquarters to gain momentum in the accelerating race against Anthropic and OpenAI to build the world’s dominant AI models.The tech giant appointed Koray Kavukcuoglu, who moved to Mountain View in the past year, to run its sprawling AI research and operations, while Demis Hassabis, DeepMind’s co-founder and long-time chief executive officer, has stepped back from day-to-day operation...