Google unveils Gemini 3.5 Flash, Omni, and Spark agent at I/O

google ceo sundar pichai introduced gemini 3.5 flash, highlighting that it outperforms gemini 3.1 pro on benchmarks while being four times faster and roughly half the cost of comparable models, potentially saving companies over a billion dollars annually. chief ai architect koray kavukcuoglu revealed that the 3.5 series is built for agentic work, capable of sustaining autonomous coding sessions for hours and reportedly building an operating system from scratch during internal testing. the new gemini omni model generalizes the veo text-to-video engine into a fully multimodal architecture, allowing users to upload videos and iteratively edit characters or styles. google also rolled out gemini spark, a personal agent running on dedicated cloud vms that remains active 24/7 to complete tasks even when user devices are powered off, with deep integration into workspace products planned.