Checking Gemini Nano

Looking for Chrome's built-in AI.

Status.

Download Gemini Nano

Chrome needs your click to start the download. It is a few gigabytes and happens once. Keep this tab open until it finishes.

1 Use desktop Chrome

Gemini Nano only runs in Chrome on Windows, macOS or Linux (and Chromebook Plus). It does not work on phones or in other browsers.

2 Switch on the two flags Start here

Chrome does not let web pages link to its own chrome:// pages. Press Copy, open a new tab, paste into the address bar and press Enter.

chrome://flags/#prompt-api-for-gemini-nanoset to Enabled

chrome://flags/#optimization-guide-on-device-modelset to Enabled BypassPerfRequirement

Then click the Relaunch button at the bottom of the flags page. If you do not see the second flag, finish step 3 first and come back.

3 Let Chrome download the model Start here

Chrome needs at least 22 GB of free disk space on the drive that holds your Chrome profile, or it will not fetch the model.

chrome://componentsOptimization Guide On Device Model, then Check for update

If the component is missing or shows version 0.0.0.0, open this page, press F12, choose Console, paste the line below and press Enter. It makes Chrome start the download.

await (window.LanguageModel ? LanguageModel.availability() : ai.languageModel.capabilities())

4 Keep the files together and open them

Put all six files in one folder. Any folder name works.

gemini-nano-playground/ index.html styles.css refraction.js controls.js markdown.js app.js

Easiest: double-click index.html. If Chrome still says the API is missing, use localhost instead, which is the most reliable: open a terminal inside that folder and run one of these, then visit the address.

python -m http.server 8000Windows: py -m http.server 8000

http://localhost:8000

5 Check again

This page also re-checks by itself when you switch back to this tab.

Good to know

Languages: Gemini Nano officially supports English, Spanish and Japanese. Russian and Polish may give poor answers or errors.

Works offline: after the one-time download the model runs on your device. You can turn off Wi-Fi and keep chatting.

About privacy: Google says Gemini Nano processes prompts on your device. This page sends nothing over the network and keeps your chats only in this browser. What Chrome itself collects is outside this page, so check Chrome's own privacy settings if it matters to you.

Accuracy: Gemini Nano is a small, older model. It can be confidently wrong, so verify anything important.

Technical details

Gemini Nano is ready

Settings

Model

How Gemini Nano answers. Takes effect on a new session.

Temperature0.80

How adventurous the model is when it picks each next word. Near 0 it nearly always takes the most likely word, so answers are steady and repeatable, which suits facts and code. Near 1 it takes more chances, so answers vary and sound more creative, but can drift or be wrong more often. The bar goes from warm (focused) to cool (adventurous).

Top-K3

How many candidate words the model may choose between at each step. The model ranks possible next words and keeps only the best K. With 1 it always takes the single best word. Higher numbers allow more variety. It works with Temperature: Top-K shortens the list, Temperature decides how boldly it picks from that list. Your browser allows 1 to 8.

System promptoptional

Hidden instructions the model reads before your first message. It starts with basic rules: plain writing, no nested lists, think first and then give a short Answer line, knowledge that ends around 2021, and no internet access. Edit it freely. Gemini Nano has a small memory, so shorter works better. It is not shown in the chat.

Visual effects

How the interface looks. Changes apply instantly.

Liquid glass

The see-through glass look on buttons, the message box and notices. Turn it off to make them solid and opaque, which is easier to read and lighter on your graphics card.

Glass refraction

Makes glass bend what is behind it, like real glass. Needs liquid glass and a Chromium browser, and uses extra graphics power. Turn it off if the glass looks flat or your computer gets loud.

Glow

The colourful light around the message box while you type, and around the screen edges while the model writes. Purely visual.

Fluid writing animation

New words melt in with a soft blur, and a small liquid blob follows the end of the line. Turn it off for plain text that simply appears.

Performance

For slower computers or a laptop on battery.

Performance mode

One switch that turns off refraction, glow and the fluid writing animation together, and keeps the glass look. Your own choices above are remembered and come back when you switch it off.

Reduce motion

Stops spinning, springy and sliding animations and shows changes instantly. If your system already asks for reduced motion, this page follows it automatically.

The Model settings only take effect on a new session. Your chat stays on screen. Effects switch on instantly.