Generate images from text using Kling O3 Omni-Image model.
Text-to-image generation 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/kling-image/o3/text-to-image", {
input: {
prompt: "A poster design says 'Kling Omni 3 Image is available on fal' with a cool font in the background as several rows and big font size. Big gap between the rows. High fashion model wearing a dress made entirely of living moss and small white flowers, standing in an abandoned greenhouse, shafts of light, editorial photography."
},
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/kling-image/o3/text-to-image", {
input: {
prompt: "A poster design says 'Kling Omni 3 Image is available on fal' with a cool font in the background as several rows and big font size. Big gap between the rows. High fashion model wearing a dress made entirely of living moss and small white flowers, standing in an abandoned greenhouse, shafts of light, editorial photography."
},
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/kling-image/o3/text-to-image", {
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/kling-image/o3/text-to-image", {
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* requiredText prompt for image generation. Max 2500 characters.
Optional: Elements (characters/objects) for face control. Reference in prompt as @Element1, @Element2, etc.
resolution ResolutionEnumImage generation resolution. 1K: standard, 2K: high-res, 4K: ultra high-res. Default value: "1K"
Possible enum values: 1K, 2K, 4K
result_type ResultTypeEnumResult type. 'single' for one image, 'series' for a series of related images. Default value: "single"
Possible enum values: single, series
num_images integerNumber of images to generate (1-9). Only used when result_type is 'single'. Default value: 1
series_amount integerNumber of images in series (2-9). Only used when result_type is 'series'.
aspect_ratio AspectRatioEnumAspect ratio of generated images. Default value: "16:9"
Possible enum values: 16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3, 21:9
output_format OutputFormatEnumThe format of the generated image. Default value: "png"
Possible enum values: jpeg, png, webp
sync_mode booleanIf True, the media will be returned as a data URI.
enable_safety_checker booleanAuthorized callers may set false to request relaxed screening. Default value: true
{
"prompt": "A poster design says 'Kling Omni 3 Image is available on fal' with a cool font in the background as several rows and big font size. Big gap between the rows. High fashion model wearing a dress made entirely of living moss and small white flowers, standing in an abandoned greenhouse, shafts of light, editorial photography.",
"elements": [
{}
],
"resolution": "1K",
"result_type": "single",
"num_images": 1,
"aspect_ratio": "16:9",
"output_format": "png",
"enable_safety_checker": true
}Generated images
{
"images": [
{
"content_type": "image/png",
"file_name": "4b654d5a07b64b498ebdb091a76611ad.png",
"url": "https://v3b.fal.media/files/b/0a8d069f/8kVewB_BV3u0f8vORGZYy_4b654d5a07b64b498ebdb091a76611ad.png",
"file_size": 1748857
}
]
}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 image in pixels.
height integerThe height of the image in pixels.
frontal_image_url stringThe frontal image of the element (main view). Optional.
Additional reference images from different angles. 0-3 images supported. Optional.