DocsBlogPricingEnterpriseCareersResearch Grants
Log-inSign-up

Imagen3 Text to Image

fal-ai/imagen3
Imagen3 is a high-quality text-to-image model that generates realistic images from text prompts.
Inference
Commercial use
Schema
PlaygroundAPI

About

Generate images using Google's Imagen 3 model.

Imagen 3 is designed to generate high-quality images with enhanced detail, richer lighting, and fewer artifacts. The model excels at:

  • Capturing fine details and textures
  • Rendering diverse art styles from photorealism to animation
  • Understanding natural language prompts
  • Maintaining high visual quality and composition

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/imagen3", {
  input: {
    prompt: "A serene landscape with mountains reflected in a crystal clear lake at sunset"
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.
import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

3. Queue#

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("fal-ai/imagen3", {
  input: {
    prompt: "A serene landscape with mountains reflected in a crystal clear lake at sunset"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("fal-ai/imagen3", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("fal-ai/imagen3", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

The text prompt describing what you want to see

negative_prompt string

A description of what to discourage in the generated images Default value: ""

aspect_ratio AspectRatioEnum

The aspect ratio of the generated image Default value: "1:1"

Possible enum values: 1:1, 16:9, 9:16, 3:4, 4:3

num_images integer

Number of images to generate (1-4) Default value: 1

seed integer

Random seed for reproducible generation

{
  "prompt": "A serene landscape with mountains reflected in a crystal clear lake at sunset",
  "aspect_ratio": "1:1",
  "num_images": 1
}

Output#

images list<File>* required
seed integer* required

Seed used for generation

{
  "images": [
    {
      "url": "https://v3.fal.media/files/kangaroo/c0RfXzCisqX6YRkIF7apw_output.png"
    }
  ],
  "seed": 42
}

Other types#

ReferenceImage#

image_url string* required

URL to the reference image file (PNG format recommended)

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

Related Models