Chrome Installs On‑Device AI Without User Consent, How to Disable It

Since April 2026, Google Chrome has been automatically downloading the Gemini Nano on‑device AI model to eligible desktop and laptop computers, without notifying users or providing a straightforward opt‑out mechanism. The model resides in a Chrome data folder that most users never open, enabling features such as scam detection and text assistance. Privacy advocates argue that the practice raises serious consent concerns.

Gemini Nano is an on‑device AI model that runs locally on devices like smartphones and laptops, rather than in the cloud. It is installed only when the hardware meets the required specifications, but the exact number of installations remains unknown.

Once installed, Gemini Nano can detect scam phone calls, help compose text messages, summarize recorded audio, and analyze Pixel phone screenshots. It should not be confused with the AI Mode feature in the address bar, which routes queries to Google Gemini servers.

A Google spokesperson told CNET that the model will automatically uninstall if the device lacks sufficient resources, such as processing power, memory, storage space, or network bandwidth.

“In February, we began rolling out the ability for users to easily turn off and remove the model directly in Chrome settings,” the spokesperson said. “Once disabled, the model will no longer download or update.”

Google provides additional information about on‑device generative AI models in Chrome on its official documentation page.

How to Remove the AI Model

If you wish to uninstall the 4 GB model from your device, first verify whether it is installed.

Users do not receive any notification of the installation, so the presence of the model must be determined manually.

The simplest method to remove Gemini Nano is to uninstall Chrome entirely.

On a Mac

1. Open Finder by clicking the blue smiling face icon on the far left of the dock.
2. Select Go from the top menu bar, hold the Option key so that Library appears, and click it.
3. Navigate to Application Support > Google > Chrome > Default and look for a folder named OptGuideOnDeviceModel. If a file named weights.bin is present, the model is installed.
4. To permanently remove it on a Mac, open Chrome, click the three‑dot menu in the top right, go to Settings > System, and toggle off On‑device AI.

On a Windows Device

To check for the model on Windows, you can use several methods.

1. Press Windows + R to open the Run dialog, paste %LOCALAPPDATA%\Google\Chrome\User Data\OptGuideOnDeviceModel, and press Enter. If the folder appears and contains weights.bin, the model is present.
2. Alternatively, use File Explorer to navigate to C:\Users\[YourUsername]\AppData\Local\Google\Chrome\User Data\OptGuideOnDeviceModel and look for weights.bin.
3. To disable the model in Chrome, go to Settings > System and toggle off On‑device AI. Then type chrome://flags in the address bar, search for “Optimization Guide,” and set “Enable Optimization Guide on Device” to Disabled.
4. Restart Chrome by fully closing the application, not just the windows.
5. Finally, delete the OptGuideOnDeviceModel folder from \AppData\Local\Google\Chrome\User Data to remove any residual files.

Why This Matters

Experts suggest that relocating AI inference to user hardware may reduce server costs for Google, but can impact device performance, battery life, and storage usage.

Legally, the automatic installation could violate the European Union’s General Data Protection Regulation by lacking user consent, and it may also breach the Corporate Sustainability Reporting Directive if the environmental impact was not disclosed.

Given Google’s history of privacy challenges, many argue that transparency and user control are essential for the responsible deployment of on‑device AI technologies.

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