Wan 2.5 text-to-video model.
fal-ai/wan-25-preview/text-to-video
Wan 2.5 text-to-video model.
Inference
Commercial use
Partner
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Generate a video from text using WAN 2.5 text-to-video model.
WAN 2.5 is the latest model with:
The client provides a convenient way to interact with the model API.
npm install --save @fal-ai/clientThe @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.
Set FAL_KEY as an environment variable in your runtime.
export FAL_KEY="YOUR_API_KEY"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/wan-25-preview/text-to-video", {
input: {
prompt: "The white dragon warrior stands still, eyes full of determination and strength. The camera slowly moves closer or circles around the warrior, highlighting the powerful presence and heroic spirit of the character."
},
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);The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.
import { fal } from "@fal-ai/client";
fal.config({
credentials: "YOUR_FAL_KEY"
});When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.
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/wan-25-preview/text-to-video", {
input: {
prompt: "The white dragon warrior stands still, eyes full of determination and strength. The camera slowly moves closer or circles around the warrior, highlighting the powerful presence and heroic spirit of the character."
},
webhookUrl: "https://optional.webhook.url/for/results",
});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/wan-25-preview/text-to-video", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
logs: true,
});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/wan-25-preview/text-to-video", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);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.
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.
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.
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);The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).
Read more about file handling in our file upload guide.
prompt string* requiredThe text prompt for video generation. Supports Chinese and English, max 1500 characters.
audio_url stringURL of the audio to use as the background music. Must be publicly accessible. Limit handling: If the audio duration exceeds the duration value (5 or 10 seconds), the audio is truncated to the first 5 or 10 seconds, and the rest is discarded. If the audio is shorter than the video, the remaining part of the video will be silent. For example, if the audio is 3 seconds long and the video duration is 5 seconds, the first 3 seconds of the output video will have sound, and the last 2 seconds will be silent.
aspect_ratio AspectRatioEnumThe aspect ratio of the generated video Default value: "16:9"
Possible enum values: 16:9, 9:16, 1:1
resolution ResolutionEnumVideo resolution tier Default value: "1080p"
Possible enum values: 480p, 720p, 1080p
duration DurationEnumDuration of the generated video in seconds. Choose between 5 or 10 seconds. Default value: "5"
Possible enum values: 5, 10
negative_prompt stringNegative prompt to describe content to avoid. Max 500 characters.
enable_prompt_expansion booleanWhether to enable prompt rewriting using LLM. Improves results for short prompts but increases processing time. Default value: true
seed integerRandom seed for reproducibility. If None, a random seed is chosen.
enable_safety_checker booleanIf set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked. Default value: true
{
"prompt": "The white dragon warrior stands still, eyes full of determination and strength. The camera slowly moves closer or circles around the warrior, highlighting the powerful presence and heroic spirit of the character.",
"aspect_ratio": "16:9",
"resolution": "1080p",
"duration": "5",
"negative_prompt": "low resolution, error, worst quality, low quality, defects",
"enable_prompt_expansion": true,
"enable_safety_checker": true
}The generated video file
seed integer* requiredThe seed used for generation
actual_prompt stringThe actual prompt used if prompt rewriting was enabled
{
"video": {
"url": "https://storage.googleapis.com/falserverless/example_outputs/wan-25-i2v-output.mp4",
"content_type": "video/mp4"
},
"seed": 175932751,
"actual_prompt": "The white dragon warrior stands still in a grand cathedral-like structure, its glowing golden eyes fixed forward. The camera slowly moves closer, focusing on the warrior's armored chest and face. It then begins to circle around the warrior, capturing the intricate details of the white scale armor with gold accents. The warrior maintains a strong, determined posture. Ambient sounds and soft choral tones fill the background, enhancing the majestic atmosphere. The camera continues its slow circular motion, emphasizing the warrior's heroic presence before ending with a close-up of the face."
}url string* requiredThe URL where the file can be downloaded from.
content_type stringThe mime type of the file.
file_name stringThe name of the file. It will be auto-generated if not provided.
file_size integerThe size of the file in bytes.
width integerThe width of the video
height integerThe height of the video
fps floatThe FPS of the video
duration floatThe duration of the video
num_frames integerThe number of frames in the video