Chrome 148 Quietly Downloads 4GB of AI Data: What You Need to Know, How to Stop It

What Happened: The 4GB Download Explained

Recent reports, including one from Gizchina.com, have highlighted that Google Chrome version 148 is downloading a large AI model file—roughly four gigabytes—in the background without explicit user consent. Users on Windows, macOS, and Linux have noticed the download happening automatically after updating to Chrome 148. The file is apparently intended to power on‑device AI features such as smart history search, AI‑powered tab grouping, or future generative tools that run locally rather than in the cloud.

Google has since responded, explaining that the download is part of its plan to bring more on‑device AI capabilities to Chrome. The company says the download is meant to improve performance and privacy (because data stays on your device), but the silent, large‑scale download caught many users off guard—especially those with limited data plans or restricted storage.

Why It Matters for Your Privacy and Data Usage

Even if you’re not interested in AI features, the download consumes bandwidth and disk space without asking. For anyone on a metered connection or using a laptop with a small SSD, four gigabytes can be significant. From a privacy standpoint, on-device AI means your browsing history and interactions stay local rather than being sent to Google’s servers, which some users may see as a net positive. However, the lack of transparency about the download undermines trust. Users have a right to know what software is doing on their devices, especially when it involves transferring multiple gigabytes of data.

What You Can Do: Step‑by‑Step

You have a few options: check if the download has already happened, delete it, and prevent future downloads.

1. Check if Chrome Already Downloaded the AI Data

  • Open Chrome and type chrome://version in the address bar.
  • Look for the Profile Path entry. Navigate to that folder on your computer.
  • Inside the profile folder, find a subfolder named AI or OnDeviceAI. If it exists, check its size. A folder near 4 GB confirms the download.

Alternatively, on Windows, you can check C:\Users\<YourUsername>\AppData\Local\Google\Chrome\User Data\Default\OnDeviceAI. On macOS, it’s under ~/Library/Application Support/Google/Chrome/Default/OnDeviceAI. On Linux, look under ~/.config/google-chrome/Default/.

2. Delete the Downloaded AI Data

Simply delete the entire OnDeviceAI folder (or the equivalent). Chrome will recreate a smaller version only if you later enable AI features, but it should not re‑download the full 4 GB again unless you explicitly turn those features on.

3. Disable the Automatic AI Download

  • Go to chrome://settings/ai (this URL may vary slightly depending on your version).
  • Toggle off any options that say “Try out experimental AI features” or “Download AI models for on‑device use.”
  • Also check under chrome://settings/syncSetup and look for “Automatically download AI models” – disable it if present.

If the ai settings path doesn’t work, use chrome://flags and search for “on‑device AI” or “download AI models”. Set any related flags to Disabled. Be aware that changing flags can affect Chrome’s stability; reverse the changes if you encounter problems.

4. Block the Download via Chrome Policies (Advanced)

If you manage Chrome at work or want a permanent block, you can set the policy DownloadOnDeviceAI to 0 via Group Policy or a managed browser. For individual users, the steps above should suffice.

Official Response from Google

According to the Gizchina article and other reports, Google acknowledged the download and issued a statement explaining that it is intended to enable future on‑device AI experiences. They emphasized that the downloaded model runs entirely locally and does not phone home with your data. Google also stated that users can opt out by disabling AI features in Chrome Settings, though the exact wording and availability of these controls may evolve with future updates.

Should You Be Concerned?

The download itself does not appear to be malicious, but it is a reminder that even trusted software can consume resources without clear upfront notice. If you are comfortable with on‑device AI and have enough storage and bandwidth, you can leave it in place. Otherwise, following the steps above will let you reclaim that space and keep Chrome from repeating the download.

Check your settings, monitor your data usage, and remember that you are in control of what your browser does—even when the default behavior says otherwise.

Sources: Gizchina.com (May 2026), Google Chrome Help documentation, community reports on Reddit and Hacker News.