HG Hybrid AI
Hybrid on-device/cloud generative AI web app using Firebase AI Logic.
What it does
- Initializes the on-device Gemini Nano model in Chrome after a user click.
- Generates text from text and optional JPEG/PNG image input.
- Uses PREFER_ON_DEVICE mode: on-device when available, cloud fallback otherwise.
- Displays whether inference used on-device or cloud.
How it uses Firebase AI Logic
- FirebaseApp + GoogleAIBackend
- getGenerativeModel with InferenceMode.PREFER_ON_DEVICE
- initializeDeviceModel after user interaction
- generateContent for text and multimodal input
- App Check enforced (debug token for local dev)
Tech stack
Vite, Firebase JS SDK, Firebase Hosting.
Run locally
npm install npm run dev
Hosted demo
https://hg-hybrid-ai-2026.web.app
Repository
https://github.com/hgreco85/hg-hybrid-ai
Challenges
On-device model availability depends on Chrome version/flags; cloud fallback ensures functionality. App Check debug token required for local testing.
Built With
- firebase-ai-logic
- firebase-hosting
- javascript
- vite
