Gemini Spark Review: Google’s 7×24 cloud personal agent, is it worth US$100 a month?

Close the computer and lock the phone, and the task is still running on the cloud. Gemini Spark is a personal Agent released by Google at I/O 2026. It runs on the Google Cloud dedicated virtual machine and can monitor emails, compile reports, and write report drafts for you. It is driven by Gemini 3.5 Flash plus Antigravity framework, and its speed is claimed to be several times faster than similar ones. But the full version costs $100 a month and is only available in some regions. Is this thing a prototype of a digital employee or just another marketing gimmick? I touched it from beginning to end. Product Overview Gemini Spark is Google in 2026 5