Chrome 148 Is Downloading a 4GB AI Model: Here’s What You Need to Know

If you noticed your hard drive space shrink after updating Google Chrome recently, you’re not alone. A number of users discovered that Chrome 148 had quietly downloaded a roughly 4GB AI model without any clear notification or request for permission. Google has since acknowledged the download and explained its purpose. This article walks through what happened, what it means for your privacy and storage, and how to manage it yourself.

What Happened

Starting with Chrome 148, the browser began downloading a large on-device AI model intended to power local machine learning features—such as real-time translation, image generation, and other AI tools that run entirely on your computer. According to a report from Gizchina (May 11, 2026), Google confirmed the download after users flagged a sudden increase in Chrome’s data folder.

The model is stored inside Chrome’s user data directory. On Windows, you’ll find it under %localappdata%\Google\Chrome\User Data\AI; on macOS, ~/Library/Application Support/Google/Chrome/AI; and on Linux, ~/.config/google-chrome/AI. The size is roughly 4GB, though it can vary slightly by platform.

Google’s official explanation is that the model is needed to enable upcoming on-device AI features in Chrome, and that the download happens automatically as part of the update process. The company states that no user data is transmitted during the download, and that all processing using the model occurs locally.

Why It Matters

The core concerns are privacy and storage management.

Privacy-wise, the download itself does not send data to Google—it is a one-time transfer of the model files. Once on your machine, the AI features process information locally. This is generally better for privacy than sending data to a cloud server. However, the silent nature of the download raised alarms because users were not given an explicit choice before gigabytes of storage were consumed, especially on devices with limited SSD space.

Storage-wise, 4GB is not trivial. On a 128GB laptop or a phone with limited free space, losing several gigabytes without notice can be problematic. Additionally, if you delete the folder yourself, Chrome may simply redownload it if the associated AI features remain enabled. That creates a loop you need to actively break.

The larger question is about user agency: should browsers download large models without asking? Google has not provided a toggle in the standard settings to prevent the download entirely during the update process.

What You Can Do Right Now

Here are the practical steps to check for the download, remove it if you want, and prevent it from coming back.

Check if the AI Model Is on Your System

  • Windows: Open File Explorer and paste %localappdata%\Google\Chrome\User Data\AI into the address bar.
  • macOS: In Finder, press Cmd+Shift+G and enter ~/Library/Application Support/Google/Chrome/AI.
  • Linux: Use your file manager or terminal to navigate to ~/.config/google-chrome/AI.

If the folder exists and contains a large model file (several GB), it’s there.

Remove the Model (Temporary Solution)

You can safely delete the entire AI folder. Chrome should continue working normally, but any on-device AI features that rely on the model will be unavailable until it is redownloaded.

To delete:

  • Close Chrome completely.
  • Delete the AI folder.
  • (Optional) Empty your recycle bin/trash to reclaim the space.

Prevent Future Downloads (Permanent Solution)

To stop Chrome from downloading the model again, you need to disable the AI features that require it.

  1. Open Chrome and go to chrome://settings.
  2. In the search bar at the top, type AI.
  3. Look for a section labeled something like “AI” or “On-device AI” (the exact wording may vary by version). Turn off any toggles for features such as “Real-time translation,” “Image generation,” or “On-device AI services.”
  4. Restart Chrome.

If you cannot find the setting in the main menu, check chrome://flags and search for “on-device AI.” Be careful with flags, as they are experimental and can change. Disabling the relevant flags (like #enable-on-device-ai or similar) may also prevent the download.

After disabling these settings, delete the AI folder again. Chrome should no longer attempt to re-download it.

What This Means Going Forward

This incident highlights an ongoing tension between convenience and control. On-device AI can improve performance and privacy by keeping data local, but automatic background downloads of several gigabytes cross a line for many users. Google has not said whether future updates will offer a clear “ask before downloading large models” option.

If you value storage and want to decide when to enable such features, the steps above give you a way to opt out. If you use or want to use on-device AI tools, the model is ready to go—just be aware of the space it consumes.

As with any automatic update, it pays to occasionally check what your browser is storing. A few minutes of inspection can save you from unexpected disk shortages.

Sources:

  • Gizchina, “Google Explains Chrome 148 Privacy Concerns as Users Discover Silent 4GB AI Download,” May 11, 2026.
  • Google’s official response as cited in the above article (model details and privacy assurances).