Chrome is Silently Installing 4GB AI Model on Your Device without Consent. Here’s how to find it and remove it.

Sometime we cover things on the Packet Protector Podcast News Roundup episodes that need immediate attention. This is one.

Chrome has been sneaking a local AI model on systems, possibly since 2024.

• Across multiple platforms (MacOS, Windows, Linux, etc.) if the device is capable.
• No notice.
• No opt-in.
• No consent.
• Uses purposefully obscure and misleading naming conventions.
• Delete it… Chrome re-installs it.
• CONCERNS: Myriad – Privacy, resource impact, environmental, data exfil (there’s a Prompt API accessible).

How to Disable and Remove It

Quick option..

1. Browse to chrome://flags
2. Search for optimization-guide-on-device-model
3. Set to Disable (to remove and restart Chrome)

See If It’s Installed Now

On Mac

• Run this in Terminal: find ~/Library/Application\ Support/Google/Chrome -size +1G -ls 2>/dev/null

On Windows

• Search your C: drive for weights.bin and/or
• Look for a folder named OptGuideOnDeviceModel under your Chrome user profile. Look in %LOCALAPPDATA%\Google\Chrome\User Data

Enterprise Centralized Removal Options

• On Windows Registry key: navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome, create a DWORD called GenAILocalFoundationalModelSettings and set it to 1
• Enterprise environments can also push policy via GenAILocalFoundationalModelSettings in Chrome’s enterprise policy framework

More info and articles

• Fantastic research and write-up on the issue by Alexander Hanff (LLM, CIPPE, CIPT)
  Google Chrome silently installs a 4 GB AI model on your device without consent. At a billion-device scale the climate costs are insane https://www.thatprivacyguy.com/blog/chrome-silent-nano-install/
• Overview at the Register.
  Chrome silently installs a 4 GB local LLM on your computer https://www.theregister.com/ai-and-ml/2026/05/07/chrome-silently-installs-a-4-gb-local-llm-on-your-computer/5230893