On-device AI not detected
Chrome's Prompt API (Gemini Nano) is still rolling out to public web pages. Two ways to
try it right now:
Option 1: Enable in Chrome Canary or Dev
- Install Chrome Canary or Chrome Dev (desktop)
-
Visit
chrome://flags/#prompt-api-for-gemini-nano
→ set to Enabled -
Visit
chrome://flags/#optimization-guide-on-device-model
→ set to Enabled BypassPerfRequirement - Restart Chrome
-
Visit
chrome://components
→ find Optimization Guide On Device Model → click
Check for update - Wait for the ~2GB Gemini Nano download to complete
- Reload this page
Requires Windows 10/11, macOS 13+, or Linux, with at least 22GB free on the Chrome
profile volume.
Option 2: Wait for the production rollout
When this site is deployed to a domain, the maintainer will register an Origin Trial
token so any recent Chrome can use the assistant without flipping flags. The token gets
embedded in a meta tag and Chrome enables the API for that origin automatically.