If you navigate to the C:\Users\ [UserName]\ AppData\ Local\ Google\ Chrome\ User Data\ OptGuideOnDeviceModel\ folder you'll find files taking up from 1 to several GB for the Chrome browser's builtin AI. You can get rid of that to reclaim the disk space if you want -- you can still use Google's Gemini AI online, and this has no effect on the AI overviews when you use Google search. Per Google's AI overview in search:
Step 1: Disable related flags in ChromeOpen Chrome and type chrome://flags into the address bar, then press Enter.
In the search bar, find and set the following flags to Disabled:
Optimization Guide On Device Model
Prompt API for Gemini Nano
Click the "Relaunch" button that appears at the bottom of the screen to restart Chrome.Step 2: Delete the folder
Navigate to the OptGuideOnDeviceModel folder. The path is different depending on your operating system:
Windows: %USERPROFILE%\AppData\Local\Google\Chrome\User Data\OptGuideOnDeviceModel