Ideogram V4.0q Image-to-Image LoRA applies a custom-trained LoRA on top of an input image, steering edits toward a specific style, subject, or brand identity while keeping the source composition intact.

ideogram/v4/image-to-image/lora

Inference

Commercial use

Streaming

Schema

LLMs

Playground API Examples

Loading API documentation…

ideogram/v4/image-to-image/lora

Schema

LLMs

Loading API documentation…

ideogram/v4/image-to-image/lora

Inference

Commercial use

Streaming

Schema

LLMs

Playground API Examples

1. Calling the API

2. Authentication

API Key

3. Queue

4. Files

5. Schema

About

Image-to-image generation with user-supplied LoRA weights applied.

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

Migrate to @fal-ai/client

The @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.

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("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  },
  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);

Streaming#

This model supports streaming requests. You can stream data directly to the model and get the result in real-time.

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

const stream = await fal.stream("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  }
});

for await (const event of stream) {
  console.log(event);
}

const result = await stream.done();

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 an environment where you cannot set environment variables, you can configure the API key manually on the client.

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

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

Protect your API 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.

3. Queue#

Long-running requests

For long-running requests, such as training jobs or models with slower inference times, it is recommended to check the Queue status and rely on Webhooks instead of blocking while waiting for the result.

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("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  },
  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("ideogram/v4/image-to-image/lora", {
  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("ideogram/v4/image-to-image/lora", {
  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);

Auto uploads

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.

5. Schema#

Input#

prompt string* required

The prompt to generate an image from.

expansion_model ExpansionModelEnum

Which model expands the prompt. 'None' disables prompt expansion and skips its fee; 'Medium' is fast; 'Large' uses Ideogram's Magic Prompt for the highest quality. Default value: "Medium"

Possible enum values: None, Medium, Large

image_size ImageSize | Enum

The output image size. Use 'auto' to match the input image size (capped at ~25MP, up to 8192px per side). Default value: auto

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

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

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

rendering_speed RenderingSpeedEnum

The rendering speed to use. Faster speeds use fewer denoising steps. Default value: "BALANCED"

Possible enum values: TURBO, BALANCED, QUALITY

acceleration AccelerationEnum

The acceleration level to use for the image generation. Default value: "none"

Possible enum values: none, low, regular, high

num_images integer

Number of images to generate. Default value: 1

seed integer

The seed to use for generation. If not provided, a random seed will be used.

sync_mode boolean

If True, the image is returned as a data URI and is not stored.

enable_safety_checker boolean

If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked. Default value: true

output_format OutputFormatEnum

The format of the generated image. Default value: "jpeg"

Possible enum values: jpeg, png

image_url string* required

URL of the input image for image-to-image generation.

strength float

How much to transform the input image. 1.0 ignores the input image entirely; lower values stay closer to it. Default value: 0.8

loras list<LoRAInput>

List of LoRA weights to apply (maximum 3).

{
  "prompt": "A red panda perched on a mossy branch in a misty forest at sunrise",
  "expansion_model": "Large",
  "image_size": "auto",
  "rendering_speed": "BALANCED",
  "acceleration": "none",
  "num_images": 1,
  "enable_safety_checker": true,
  "output_format": "jpeg",
  "image_url": "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png",
  "strength": 0.8,
  "loras": []
}

Output#

images list<ImageFile>* required

The generated images.

timings Timings* required

seed integer* required

Seed of the generated Image. It will be the same value of the one passed in the input or the randomly generated that was used in case none was passed.

has_nsfw_concepts list<boolean>* required

Whether the generated images contain NSFW concepts.

prompt string* required

The prompt used for generating the image.

{
  "images": [
    {
      "url": "https://v3b.fal.media/files/b/0a9c92b2/JLDtkHeeec2BL7ZX3PyvI_KzumHcSa.jpg"
    }
  ],
  "prompt": ""
}

Other types#

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

LoRAInput#

path string* required

URL to an Ideogram V4 LoRA weights file (.safetensors).

scale float

Scale factor for the LoRA weights. Default value: 1

ImageFile#

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

height integer

The height of the image

Related Models

Loading API documentation…

1. Calling the API

2. Authentication

API Key

3. Queue

4. Files

5. Schema

About

Image-to-image generation with user-supplied LoRA weights applied.

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

Migrate to @fal-ai/client

The @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.

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("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  },
  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);

Streaming#

This model supports streaming requests. You can stream data directly to the model and get the result in real-time.

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

const stream = await fal.stream("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  }
});

for await (const event of stream) {
  console.log(event);
}

const result = await stream.done();

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 an environment where you cannot set environment variables, you can configure the API key manually on the client.

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

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

Protect your API Key

3. Queue#

Long-running requests

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("ideogram/v4/image-to-image/lora", {
  input: {
    prompt: "A red panda perched on a mossy branch in a misty forest at sunrise",
    image_url: "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png"
  },
  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("ideogram/v4/image-to-image/lora", {
  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("ideogram/v4/image-to-image/lora", {
  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)#

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);

Auto uploads

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.

5. Schema#

Input#

prompt string* required

The prompt to generate an image from.

expansion_model ExpansionModelEnum

Which model expands the prompt. 'None' disables prompt expansion and skips its fee; 'Medium' is fast; 'Large' uses Ideogram's Magic Prompt for the highest quality. Default value: "Medium"

Possible enum values: None, Medium, Large

image_size ImageSize | Enum

The output image size. Use 'auto' to match the input image size (capped at ~25MP, up to 8192px per side). Default value: auto

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

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

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

rendering_speed RenderingSpeedEnum

The rendering speed to use. Faster speeds use fewer denoising steps. Default value: "BALANCED"

Possible enum values: TURBO, BALANCED, QUALITY

acceleration AccelerationEnum

The acceleration level to use for the image generation. Default value: "none"

Possible enum values: none, low, regular, high

num_images integer

Number of images to generate. Default value: 1

seed integer

The seed to use for generation. If not provided, a random seed will be used.

sync_mode boolean

If True, the image is returned as a data URI and is not stored.

enable_safety_checker boolean

If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked. Default value: true

output_format OutputFormatEnum

The format of the generated image. Default value: "jpeg"

Possible enum values: jpeg, png

image_url string* required

URL of the input image for image-to-image generation.

strength float

How much to transform the input image. 1.0 ignores the input image entirely; lower values stay closer to it. Default value: 0.8

loras list<LoRAInput>

List of LoRA weights to apply (maximum 3).

{
  "prompt": "A red panda perched on a mossy branch in a misty forest at sunrise",
  "expansion_model": "Large",
  "image_size": "auto",
  "rendering_speed": "BALANCED",
  "acceleration": "none",
  "num_images": 1,
  "enable_safety_checker": true,
  "output_format": "jpeg",
  "image_url": "https://storage.googleapis.com/falserverless/model_tests/svd/rocket.png",
  "strength": 0.8,
  "loras": []
}

Output#

images list<ImageFile>* required

The generated images.

timings Timings* required

seed integer* required

Seed of the generated Image. It will be the same value of the one passed in the input or the randomly generated that was used in case none was passed.

has_nsfw_concepts list<boolean>* required

Whether the generated images contain NSFW concepts.

prompt string* required

The prompt used for generating the image.

{
  "images": [
    {
      "url": "https://v3b.fal.media/files/b/0a9c92b2/JLDtkHeeec2BL7ZX3PyvI_KzumHcSa.jpg"
    }
  ],
  "prompt": ""
}

Other types#

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

LoRAInput#

path string* required

URL to an Ideogram V4 LoRA weights file (.safetensors).

scale float

Scale factor for the LoRA weights. Default value: 1

ImageFile#

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

height integer

The height of the image

ideogram/v4/image-to-image/lora

ideogram/v4/image-to-image/lora

Table of contents

1. Calling the API

2. Authentication

3. Queue

4. Files

5. Schema

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

Streaming#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

ImageSize#

LoRAInput#

ImageFile#

Related Models

Table of contents

1. Calling the API

2. Authentication

3. Queue

4. Files

5. Schema

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

Streaming#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

ImageSize#

LoRAInput#

ImageFile#

Related Models