fal Assets is now live!
Docs
Log-inSign-up

krea/v2/large/text-to-image

Generate high-fidelity images from text with Krea 2 Large, supporting aspect ratio, creativity, seed controls, and optional style references.
Learn more about Krea 2
Inference
Commercial use
Partner
Schema
LLMs
PlaygroundAPIExamples

Table of contents

About

Generate images with Krea's krea-2 large model.

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("krea/v2/large/text-to-image", {
  input: {
    prompt: "A Van Gogh-tinged Provençal farmhouse under starry nights."
  },
  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("krea/v2/large/text-to-image", {
  input: {
    prompt: "A Van Gogh-tinged Provençal farmhouse under starry nights."
  },
  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("krea/v2/large/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("krea/v2/large/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 description of the image to generate.

aspect_ratio AspectRatioEnum

Aspect ratio of the generated image. Default value: "1:1"

Possible enum values: 1:1, 4:3, 3:2, 16:9, 2.35:1, 4:5, 2:3, 9:16

creativity CreativityEnum

Controls how loosely the model interprets the prompt. Higher values produce more creative results that may drift from the prompt; lower values stay closer to the prompt. Default value: "medium"

Possible enum values: raw, low, medium, high

seed integer

Random seed for reproducible generation.

image_style_references list<ImageStyleReference>

Optional list of reference images that guide the style of the generated image. At most 10 entries.

{
  "prompt": "A Van Gogh-tinged Provençal farmhouse under starry nights.",
  "aspect_ratio": "1:1",
  "creativity": "medium",
  "image_style_references": []
}

Output#

images list<Image>* required

The generated images.

seed integer* required

The seed used to generate the image.

{
  "images": [
    {
      "url": "https://v3.fal.media/files/panda/krea_v2_example.png"
    }
  ],
  "seed": 12345
}

Other types#

Image#

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.

width integer

The width of the image in pixels.

height integer

The height of the image in pixels.

ImageStyleReference#

image_url string* required

Publicly accessible URL of a reference image.

strength float

How strongly the reference influences the generated image. Negative values push away from the reference. Default value: 1

Related Models