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Wan v2.6 Text to Image Text to Image

wan/v2.6/text-to-image
Wan 2.6 text-to-image model.
Inference
Commercial use
Partner
Schema
LLMs
PlaygroundAPI

About

Generate images from text, optionally with one reference image.

Wan 2.6 Text-to-Image features:

  • Pure text-to-image generation (no input image required)
  • Mixed text-and-image output mode
  • Optional reference image for style guidance
  • Generate up to 5 images (actual count may vary)

Image input (optional):

  • Formats: JPEG, JPG, PNG (no alpha), BMP, WEBP
  • Resolution: 384-5000 pixels (width and height)
  • Max size: 10MB

Output specifications:

  • Format: PNG
  • Resolution: Matches input image (up to 1280*1280) or specified by size
  • May include generated text content in mixed mode

Note: Prompt expansion (prompt_extend) is not available in this mode.

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("wan/v2.6/text-to-image", {
  input: {
    prompt: "An ancient library floating among clouds, golden hour light streaming through massive windows, photorealistic"
  },
  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("wan/v2.6/text-to-image", {
  input: {
    prompt: "An ancient library floating among clouds, golden hour light streaming through massive windows, photorealistic"
  },
  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("wan/v2.6/text-to-image", {
  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("wan/v2.6/text-to-image", {
  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

Text prompt describing the desired image. Supports Chinese and English. Max 2000 characters.

image_url string

Optional reference image (0 or 1). When provided, can be used for style guidance. Resolution: 384-5000px each dimension. Max size: 10MB. Formats: JPEG, JPG, PNG (no alpha), BMP, WEBP.

negative_prompt string

Content to avoid in the generated image. Max 500 characters. Default value: ""

image_size ImageSize | Enum

Output image size. If not set: matches input image size (up to 1280*1280). Use presets like 'square_hd', 'landscape_16_9', or specify exact dimensions.

Possible enum values: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9

Note: For custom image sizes, you can pass the width and height as an object:

"image_size": {
  "width": 1280,
  "height": 720
}
max_images integer

Maximum number of images to generate (1-5). Actual count may be less depending on model inference. Default value: 1

seed integer

Random seed for reproducibility (0-2147483647).

enable_safety_checker boolean

Enable content moderation for input and output. Default value: true

{
  "prompt": "An ancient library floating among clouds, golden hour light streaming through massive windows, photorealistic",
  "negative_prompt": "low resolution, error, worst quality, low quality, deformed",
  "image_size": "square_hd",
  "max_images": 1,
  "enable_safety_checker": true
}

Output#

images list<File>* required

Generated images in PNG format

generated_text string

Generated text content (in mixed text-and-image mode). May be None if only images were generated.

seed integer* required

The seed used for generation

{
  "images": [
    {
      "file_name": "output_1.png",
      "content_type": "image/png",
      "url": "https://v3b.fal.media/files/b/0a86d6b0/cBXGSUEl3DkTcBnf9IEM0_output_1.png"
    }
  ],
  "seed": 175932751
}

Other types#

VideoFile#

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.

file_data string

File data

width integer

The width of the video

height integer

The height of the video

fps float

The FPS of the video

duration float

The duration of the video

num_frames integer

The number of frames in the video

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

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.

file_data string

File data

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