Google Chrome automatically downloads a 4GB AI model file to users' devices when certain Gemini features are enabled, consuming storage without clear notification.

Chrome installs a 4GB weights.bin file connected to Google's Gemini Nano AI model when certain AI features are enabled. The model powers Chrome tools including scam detection, writing assistance, autofill, and suggestion features.

The Gemini Nano model runs locally on users' devices rather than relying on cloud-based models, which provides privacy benefits but requires training parameters stored on the device. Users cannot simply delete the file to free up space—if AI features remain enabled, Chrome may re-download it.

Google states that 'Gemini Nano's exact size may vary as the browser updates the model,' but this information appears in a lengthy built-in AI features guide rather than at the point of enabling the features, leaving users unaware of storage requirements.