Official

black-forest-labs / flux-1.1-pro-ultra

FLUX1.1 [pro] in ultra and raw modes. Images are up to 4 megapixels. Use raw mode for realism.

Warm

Public
10.5M runs
$0.06 per image
Commercial use
Paper
License

Run with an API

Playground API Examples README

Input

prompt

*string

Shift + Return to add a new line

a majestic snow-capped mountain peak bathed in a warm glow of the setting suna majestic snow-capped mountain peak bathed in a warm glow of the setting sun

Text prompt for image generation

image_prompt

file

Image to use with Flux Redux. This is used together with the text prompt to guide the generation towards the composition of the image_prompt. Must be jpeg, png, gif, or webp.

image_prompt_strength

number

(minimum: 0, maximum: 1)

Blend between the prompt and the image prompt.

Default: 0.1

aspect_ratio

string

Aspect ratio for the generated image

Default: "1:1"

safety_tolerance

integer

(minimum: 1, maximum: 6)

Safety tolerance, 1 is most strict and 6 is most permissive

Default: 2

seed

integer

Random seed. Set for reproducible generation

raw

boolean

Generate less processed, more natural-looking images

Default: false

output_format

string

Format of the output images.

Default: "jpg"

Run this model in Node.js with one line of code:

npx create-replicate --model=black-forest-labs/flux-1.1-pro-ultra

or set up a project from scratch

Install Replicate’s Node.js client library:

npm install replicate

Set the REPLICATE_API_TOKEN environment variable:

export REPLICATE_API_TOKEN=<paste-your-token-here>

Find your API token in your account settings.

Import and set up the client:

import Replicate from "replicate";

const replicate = new Replicate({
  auth: process.env.REPLICATE_API_TOKEN,
});

Run black-forest-labs/flux-1.1-pro-ultra using Replicate’s API. Check out the model's schema for an overview of inputs and outputs.

const input = {
  raw: false,
  prompt: "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
  aspect_ratio: "3:2",
  output_format: "jpg",
  safety_tolerance: 2,
  image_prompt_strength: 0.1
};

const output = await replicate.run("black-forest-labs/flux-1.1-pro-ultra", { input });

// To access the file URL:
console.log(output.url()); //=> "http://example.com"

// To write the file to disk:
fs.writeFile("my-image.png", output);

To learn more, take a look at the guide on getting started with Node.js.

Install Replicate’s Python client library:

pip install replicate

Set the REPLICATE_API_TOKEN environment variable:

export REPLICATE_API_TOKEN=<paste-your-token-here>

Find your API token in your account settings.

Import the client:

import replicate

Run black-forest-labs/flux-1.1-pro-ultra using Replicate’s API. Check out the model's schema for an overview of inputs and outputs.

output = replicate.run(
    "black-forest-labs/flux-1.1-pro-ultra",
    input={
        "raw": False,
        "prompt": "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
        "aspect_ratio": "3:2",
        "output_format": "jpg",
        "safety_tolerance": 2,
        "image_prompt_strength": 0.1
    }
)
print(output)

To learn more, take a look at the guide on getting started with Python.

Set the REPLICATE_API_TOKEN environment variable:

export REPLICATE_API_TOKEN=<paste-your-token-here>

Find your API token in your account settings.

Run black-forest-labs/flux-1.1-pro-ultra using Replicate’s API. Check out the model's schema for an overview of inputs and outputs.

curl -s -X POST \
  -H "Authorization: Bearer $REPLICATE_API_TOKEN" \
  -H "Content-Type: application/json" \
  -H "Prefer: wait" \
  -d $'{
    "input": {
      "raw": false,
      "prompt": "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
      "aspect_ratio": "3:2",
      "output_format": "jpg",
      "safety_tolerance": 2,
      "image_prompt_strength": 0.1
    }
  }' \
  https://api.replicate.com/v1/models/black-forest-labs/flux-1.1-pro-ultra/predictions

To learn more, take a look at Replicate’s HTTP API reference docs.

Output

Generated in

8.1 seconds

Tweak itReport

Examples

View more examples

Pricing

This model is priced by how many images are generated.

Type	Per unit	Per $1
Output	$0.06 / image or 16 images / $1

For example, generating 100 images should cost around $6.00.

Check out our docs for more information about how per-image pricing works on Replicate.

Readme

About

A new high-resolution capabilities to FLUX1.1 [pro], extending its functionality to support 4x higher image resolutions (up to 4MP) while maintaining an impressive generation time of only 10 seconds per sample.

Higher Resolution, No Compromise in Speed

FLUX1.1 [pro] – ultra mode: This option enables image generation at four times the resolution of standard FLUX1.1 [pro], without sacrificing prompt adherence. Unlike many high-resolution models that experience significant slowdowns at higher resolutions, our performance benchmarks show sustained fast generation times—over 2.5x faster than comparable high-resolution offerings. This model is available at a competitive price of $0.06 per image.

Raw Mode

FLUX1.1 [pro] – raw mode: For creators seeking authenticity, our new raw mode captures the genuine feel of candid photography. Toggle this feature to generate images with a less synthetic, more natural aesthetic. Compared to other text-to-image models, raw mode significantly increases diversity in human subjects and enhances the realism of nature photography

License

By using FLUX.1 [pro] through Replicate you agree to the Black Forest Labs API agreement and the Black Forest Labs Terms of Service.