#prompt-api-for-gemini-nano
also disable:
prompt-api-for-gemini-nano-multimodal-input

*This is not comprehensive and may not stop the model file download; you will need to take more steps to remove it. Read more on Chrome's awful AI development here
Google Chrome silently installs a 4 GB AI model on your device without consent. At a billion-device scale the climate costs are insane. — That Privacy Guy!
Google Chrome is downloading a 4 GB Gemini Nano model onto users' machines without consent, with no opt-in, no opt-out short of enterprise tooling, and an automatic re-download every time the user del...
www.thatprivacyguy.com
May 8, 2026 at 5:38 AM
⚠️ Chrome's update installs a 4GB AI model file to your device without your consent!

To disable the shitty AI mode*, go to chrome://flags/ and search for these, toggle each to "disabled":

optimization-guide-on-device-model
prompt-api-for-gemini-nano
ai-mode-omnibox-entry-point
-
May 8, 2026 at 5:38 AM
I know Google wants to push a “Prompt API” in Chrome so I suspect non-Chrome Chromium browsers will have to decide if they want to bundle a model or not to be 100% compatible apidog.com/blog/what-is...
What Is the Chrome Prompt API? Browser AI for API Developers
Chrome's Prompt API exposes Gemini Nano on-device. What it is, how it differs from cloud Gemini, where it fits an API workflow, code for extensions and web pages, and the limits.
apidog.com
May 5, 2026 at 3:35 PM
Just found a fun project: Arcrawls (arcrawls.com) 👾

It’s a nostalgic browser pet that reacts to your tabs & gains XP. And, yes it has AI ✨😊!

By using a local Distilbert & Prompt API, it avoids the downsides of AI for fun projects. Zero cost, Zero keys, Privacy.

Code: github.com/fujiDevv/con...
Arcrawls – Context-Aware AI Browser Pet | 100% Local & Private
The first browser pet that understands your vibe. Real-time context reactions, 140+ animations, spring physics, and fully local AI (Gemini Nano). Zero cloud data. Open source.
arcrawls.com
July 17, 2026 at 5:17 AM
🚀 Hack Chrome que peu connaissent : le Flag “Prompt API for Gemini Nano”.

📈 Résumez, reformulez et classifiez des textes directement depuis Chrome !

💡 Activez-le en 2 minutes ➡️ mychromebook.fr/boos...

#GoogleChrome #TechTips #IA
🚀 Boostez Chrome avec le Flag “Prompt API for Gemini Nano” - Mychromebook.fr
Activez “Prompt API for Gemini Nano”, un Flag Chrome pour résumer et reformuler avec Chrome en un clic tout vos textes
mychromebook.fr
November 21, 2024 at 5:30 PM
2 choses :
- dans ta barre de recherche, tape chrome://flags
Désactive les options "Prompt API for Gemini Nano" et "Enables optimization guide on device"
(ça peut suffire pour être moins spammé d'IA)

- Et aussi :
francoischarron.com/gadgets-tech...
Comment désactiver les aperçus IA des recherches Google
Vous êtes tanné que Google génère un aperçu alimenté par l'IA lorsque vous faites des recherches en ligne? On vous explique comment le désactiver sur Chrome.
francoischarron.com
May 22, 2026 at 7:16 PM
Wer den #GeminiNano Irrsinn loswerden will, setzt auf Firefox. Wer #GoogleChrome beruflich benötigt, kann folgendes versuchen:

In der Adressleiste eingeben:
chrome://flags

Suchen nach:

prompt-api-for-gemini-nano
optimization-guide-on-device-model

Im Dropdown rechts bei beiden "Disabled" setzen.
Goodbye Google Chrome, nice to have met you …
"Google Chrome silently installs a 4 GB AI model on your device without consent. At a billion-device scale the climate costs are insane."
May 6, 2026 at 3:36 PM
Search for "Prompt API for Gemini Nano" and set to disabled.

Click Relaunch at the bottom to apply changes.

I also went to chrome://settings/system and unchecked the on-device AI option.
May 6, 2026 at 3:33 PM
Here is how to stop it permanently 👇

1. Open Chrome
2. Type chrome://flags
3. Search "Optimization Guide On Device Model"
→ Set to Disabled
4. Search "Prompt API for Gemini Nano"
→ Set to Disabled
5. Relaunch Chrome
6. Manually delete weights.bin file
May 24, 2026 at 7:54 PM
If you've been on the fence about dropping Chrome as your web browser, here's some food for thought. www.techtimes.com/articles/316...
Google Ships Chrome Prompt API Over Objections From Mozilla, Apple, W3C, and Microsoft
Google shipped its Prompt API in Chrome 148 on May 5, 2026, embedding a JavaScript interface to its Gemini Nano AI model directly into the browser — and doing so after Mozilla, Apple’s WebKit team, th...
www.techtimes.com
May 18, 2026 at 8:45 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 11:29 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 10:54 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 9:41 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 8:59 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 6:42 PM
Show HN: Simple wrapper for Chrome's built-in local LLM (Gemini Nano) Chrome now includes a native on-device LLM (Gemini Nano) starting in version 138. I've been building with it since it w...

Origin | Interest | Match
GitHub - kstonekuan/simple-chromium-ai: A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety.
A lightweight TypeScript wrapper for Chrome's built-in AI Prompt API that trades flexibility for simplicity and type safety. - kstonekuan/simple-chromium-ai
github.com
July 6, 2025 at 6:31 PM
4. CAN YOU DISABLE IT?

Some users report disabling these Chrome flags:

`chrome://flags/#optimization-guide-on-device-model`

`chrome://flags/#prompt-api-for-gemini-nano`

Then restarting Chrome and deleting the folder manually.
May 11, 2026 at 12:34 PM
For this break, I went way too in-depth on how I got function/tool calling in my Web Application to work with WebMCP, WebLLM and the Prompt API ( Gemini Nano in Chrome )

Full video and links:
untilit.works/break/tHY8D3...

#WorkinOnIt
March 8, 2026 at 4:18 PM