We came across a viral post circulating on X that claims that Google Chrome is silently downloading a 4 gigabyte (GB) artificial intelligence model onto users’ computers without consent, notification, or any meaningful way to stop it.
The post alleges that a model called Gemini Nano installs itself in the background, including on devices where Chrome had only just been installed, and claims the model can be triggered by visiting any website. Within around 10 hours, the post had garnered over 200,000 views.
The post was shared by Evan Luthra, a crypto entrepreneur active on X, where he regularly posts about blockchain and emerging technology.
With Chrome accounting for nearly 78% of all browser usage in Singapore, this could affect a substantial number of people, prompting us to take a closer look.
What is Gemini Nano?
Gemini Nano is a scaled-down version of Google’s Gemini AI model, “Nano” referring to its smaller size relative to the full model. It is designed to run directly on a user’s computer rather than in the cloud, powering features such as writing assistance, text summarisation, and translation, without sending data to an external server.
According to technical guides published by Google for web developers, Chrome manages Gemini Nano as part of its built-in AI features, downloading and updating it automatically as part of the browser’s existing infrastructure, without requiring the user to install anything separately.
Google also states that when Gemini Nano processes requests on your device, no data is sent to Google or any third party. It is worth noting, however, that this applies only to the on-device features Gemini Nano powers, such as writing assistance and scam detection. Chrome’s most visible AI feature, the “AI Mode” button in the address bar, still sends your queries to Google’s servers over the internet, rather than processing them locally.
What holds up
Google confirms that Chrome can download Gemini Nano to eligible devices as part of enabling AI features that run directly on your device, and this applies to existing Chrome users, not just those installing Chrome for the first time.
Before downloading, Chrome briefly tests the computer’s graphics processor to determine which of two variants to install, a larger version for higher-powered devices or a smaller one for less powerful ones. If the device does not meet the minimum hardware requirements, such as at least 22GB of free storage and sufficient processing power, the download is skipped entirely.
Multiple specialist technology publications, including Malwarebytes, a cybersecurity firm, and PCWorld, a long-established technology publication, have independently confirmed that the file can reach approximately 4GB and downloads automatically with no notification to the user.
In response to the widespread attention similar claims received, a Google spokesperson said the company has offered Gemini Nano in Chrome since 2024, describing it as a lightweight on-device model that powers security features such as scam detection without sending data to the cloud. Google added that the model will automatically uninstall if the device runs low on storage, and that since February 2026, users have been able to turn off and remove the model directly in Chrome’s settings, after which it will no longer download or update.
Where the claim becomes misleading
The claim that any website can trigger the download of Gemini Nano simply by being visited is not supported by evidence. The installation is controlled by the Chrome browser process, not websites that a user happens to visit.
Chrome runs each website inside a secure, isolated environment called a sandbox, which limits what the website can and cannot do on your device. Chrome’s own security records confirm that the process handling website content runs with limited access permissions and cannot open files or interact with the rest of your device. While websites can prompt users to download files through the standard download process, which requires a deliberate click, they have no access to the internal mechanism through which Chrome manages and installs its own components.
Therefore, we rate the claim as partly true. Chrome does automatically download Gemini Nano on eligible devices as part of its built-in AI infrastructure. However, the available evidence does not support the claim that any website can trigger the download.
The claims in the post largely trace back to research by privacy researcher Alexander Hanff, published in early May 2026, documenting how Chrome automatically downloaded a 4GB AI model onto a freshly created browser profile without any user interaction, findings that quickly gained traction across technology and privacy communities.
Luthra’s post was among several that circulated these findings without cited sources or technical context, yet accumulated over 200,000 views within hours. As this situation continues to develop, it is worth approaching similar claims with caution and checking them against credible sources before drawing conclusions or sharing them further.
