Katherine Blunt and Rolfe Winkler, reporting for The Wall Street Journal from Google I/O (gift link): Google is supercharging its Gemini artificial-intelligence model to become more competitive in the era of agentic AI. The company has started rolling out what it calls Gemini Spark, a personal agent it says is capable of navigating a user’s digital life and acting on his or her behalf. The agent will work across many of Google’s products and run on the company’s cloud infrastructure. [...] The company has been testing Spark with a limited number of users and plans to make it available next week to those who pay for AI Ultra, a new subscription tier that costs $100 a month. A different top-level takeaway than the NYT’s , which in turn was different from Bloomberg’s .…