Imagen API

Imagen is Google's text-to-image model line. Generate images with Imagen 4 through Puter.js — no API keys, no Google Cloud or Vertex AI setup, no backend.

Get Started Read Tutorial

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.txt2img("A futuristic city skyline at sunset, cinematic lighting", {
    model: "google/imagen-4.0"
}).then(image => {
    document.body.appendChild(image);
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.txt2img("A futuristic city skyline at sunset, cinematic lighting", {
            model: "google/imagen-4.0"
        }).then(image => {
            document.body.appendChild(image);
        });
    </script>
</body>
</html>

The Imagen API for Google Text-to-Image

High-Quality Text-to-Image

Imagen 4 produces sharp, detailed images with strong prompt adherence and accurate text rendering.

Fast / Standard / Ultra

Choose the tier that fits — Fast for speed and volume, Ultra for maximum fidelity up to 2K.

Aspect Ratios

Generate across nine aspect ratios, from square to widescreen and portrait.

No Vertex Setup

Skip the Gemini-API-vs-Vertex-AI decision and GCP onboarding — Puter handles access for you.

Up to 4 Images

Request multiple images per call to give users variations to choose from.

No Keys, User-Pays

No Google Cloud account or API key — your users cover their own usage, free for you to ship.

Imagen Models Compared

Every Imagen model available through Puter.js, with per-image cost and output resolution. Click a model for full specs and examples.

Model	Cost / Image	Resolution	Released
Imagen 4 Ultra `google/imagen-4.0-ultra`	$0.0602	1MP	Aug 2025
Imagen 4 `google/imagen-4.0`	$0.04	1MP	Aug 2025
Imagen 4 Preview `google/imagen-4.0-preview`	$0.04	1MP	May 2025
Imagen 4 Fast `google/imagen-4.0-fast`	$0.02	1MP	Aug 2025

Use Imagen in Seconds

Add Imagen to your app with just a few lines of code.
No API keys, no backend, no configuration required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.txt2img("A futuristic city skyline at sunset, cinematic lighting", {
    model: "google/imagen-4.0"
}).then(image => {
    document.body.appendChild(image);
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.txt2img("A futuristic city skyline at sunset, cinematic lighting", {
            model: "google/imagen-4.0"
        }).then(image => {
            document.body.appendChild(image);
        });
    </script>
</body>
</html>

View full documentation →

Frequently Asked Questions

What is the Imagen API?

The Imagen API lets you generate images from text prompts using Google's Imagen 4 text-to-image models, available in Fast, Standard, and Ultra tiers — including Imagen 4 — through Puter.js, with no API keys and no backend.

Is the Imagen API free?

Yes, it is free for you as the developer when you use it through Puter.js. With the User-Pays model, each of your users covers their own usage through their Puter account, so you can ship Imagen-powered apps at no cost to you.

Which Imagen model should I use?

Start with Imagen 4 as your default. Lighter or faster variants trade some quality for speed and cost — compare them in the table above and pick the one that fits your use case.

Can I edit images or do image-to-image?

Many Imagen models support image editing and image-to-image generation alongside text-to-image. See the Puter.js documentation for what each model supports.

How much does Imagen cost?

Imagen 4 costs about $0.04 per image at the API level. Through Puter.js it is free for you as the developer — your users cover their own usage under the User-Pays model, with no per-image billing or keys to manage.

Do I need an API key?

No. Puter.js handles authentication and infrastructure for you, so you can use the Imagen API without any API key, an Google account, a server, or any configuration.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Imagen API through Puter.js works with any JavaScript framework, Node.js, or plain HTML. Just include the library and start building.

Related Resources

Learn how to use Imagen and other models with Puter.js.