# Google is Secretly Trying to Run a 4GB AI Model Without You Knowing it! 😱 > Source: > Published: 2026-06-19 15:10:23+00:00 I recently discovered something interesting. If you're using Google Chrome, there is a chance that Chrome has downloaded a 4GB AI model called Gemini Nano directly onto your computer without a clear notification. The file is usually stored as weights.bin inside Chrome's local data folders. **What is Gemini Nano?** Gemini Nano is Google's lightweight AI model designed to run directly on your device instead of sending everything to cloud servers. It powers features such as: The goal is faster responses and better privacy because some processing happens locally. 👍 Benefits Powers s ecurity features like scam detection locally 👎 Downsides Consumes around 4GB of storage Can increase RAM usage during AI tasks May affect laptops with lower memory (8GB–12GB RAM) Uses bandwidth for downloading the model Many users were unaware it had been downloaded **How to Check if You Have It (Windows)** Open File Explorer and check: `C:\Users\YOUR_USERNAME\AppData\Local\Google\Chrome\User Data\` Look for a folder named: `OptGuideOnDeviceModel` If you see a large weights.bin file (~4GB), that's Gemini Nano. ** How to Remove It Completely** Step 1: Open Chrome Go to: `chrome://settings/system` Disable: `On-device AI` Step 2: Open `chrome://flags` Search and disable: Gemini Nano Prompt API Optimization Guide On Device Model Other Gemini-related experimental flags Step 3: Close Chrome completely. Step 4: Delete the folder: `OptGuideOnDeviceModel` Step 5 (Optional): Enterprise/advanced users can block future downloads through Chrome policies. Google has also added controls to disable and remove the model in newer Chrome versions. **My Take** Running AI locally is the future. But if an AI model takes 4GB of storage and potentially several more GB of RAM while running, users should be informed before it lands on their devices. Privacy-friendly AI is great. Silent 4GB downloads? That's where the debate starts.