Google I/O 2026 is from 19–20 May and delivered one of the most dense keynotes in the conference’s history. Gemini 3.5 Flash, Gemini Omni, Gemini Spark, Android XR smart glasses, a Universal Cart, Googlebook, and Antigravity 2.0 all launched. Here is the complete breakdown of the best Google IO 2026 announcements across Android, Gemini, and developer tools.