Flux pro 1.1 ultra API

blackforestlabs/flux-pro-1.1-ultra
Flux 1.1 Pro Ultra is a high-speed AI image generator optimized for diverse applications.
Output
$0.06 / gen (variable)
Released
Jun 12, 2026

Overview

Flux-Pro/V1.1-Ultra Description

Basic Information

  • Model Name: Flux 1.1 Pro Ultra
  • Developer/Creator: Black Forest Labs
  • Release Date: November 6, 2024
  • Version: 1.1
  • Model Type: Text-to-Image Generation Model

Overview

‍Flux 1.1 Pro Ultra is an advanced AI image generator designed to create high-resolution images rapidly and efficiently. It is optimized for various applications, including content creation, e-commerce, and advertising, providing users with the ability to generate visually appealing images at unprecedented speeds.

‍Key Features

  • Supports image generation at resolutions up to 4MP (4 times higher than standard models).
  • Fast generation time of approximately 10 seconds per image.
  • Raw Mode for generating less processed and more natural-looking images.
  • Enhanced diversity in human subjects and improved realism in nature photography.
  • Flexible aspect ratios supported, including 21:9, 16:9, 4:3, and more.

Intended Use

  • Content creation for digital marketing and social media.
  • E-commerce product image generation.
  • Game development asset creation.
  • Architectural visualization and design concepts.

Language Support:

‍Flux 1.1 Pro Ultra primarily supports English but can handle prompts in other languages depending on the input structure.

Technical Details

Architecture

‍Flux 1.1 Pro Ultra is built on a refined version of the Transformer architecture, optimized for image generation tasks:

  • Model Type: Hybrid SSM (Structured Sparse Matrix) Transformer
  • Parameters: Approximately 12 billion parameters
  • Attention Mechanism: Multi-head attention with enhanced efficiency for high-resolution outputs.

Training Data

‍The model was trained on a diverse dataset that includes a wide range of images and textual descriptions to enhance its understanding of visual concepts.

  • Data Source and Size: The training dataset includes millions of images sourced from various domains, ensuring a broad representation of styles and subjects.
  • Diversity and Bias: The training data was curated to minimize bias while maximizing diversity in the types of images generated. This approach enhances the model's ability to produce varied outputs across different contexts.

Performance Metrics

‍Flux 1.1 Pro Ultra has demonstrated strong performance metrics:

  • Image generation time: Approximately 10 seconds per sample.
  • Resolution capabilities: Up to 4MP without loss of quality.
  • User satisfaction ratings indicate high adherence to prompts and output diversity.

Comparison to Other Models

2048x2048 Resolution for Ultra-Detail Artwork‍

Flux 1.1 Pro's Ultra mode offers a remarkable 4x boost in resolution, reaching up to 2048x2048 (4MP) for exceptionally detailed artwork and high-quality prints. Perfect for creators, it produces sharp, vibrant graphics suitable for posters, marketing materials, and fine art.

10-Second Generation, 2.5x Faster‍

With a rapid 10-second generation time, Flux 1.1 Pro is 2.5x faster than most high-resolution AI models. It maintains detail and quality even at higher resolutions, making it ideal for time-sensitive projects.

‍

Usage

Code Samples:

The model is available on the AI/ML API platform as "flux-pro/v1.1 ultra" .

To enable raw mode, simply add raw to the models name. Here is an example:

API Documentation

Detailed API Documentation is available here.

Ethical Guidelines

Black Forest Labs emphasizes ethical considerations in AI development by promoting responsible usage of their models. They encourage users to adhere to guidelines that prevent misuse or harmful applications of generated content.

Licensing

Flux 1.1 Pro Ultra is available under a commercial license that allows both commercial and non-commercial usage rights while ensuring compliance with ethical standards.

‍

Try Flux 1.1 [Pro Ultra] API here.

‍

Use cases

  • High-Resolution Marketing: Produce crisp 4 MP visuals for print or display
  • Creative Concept Art: Rapid generation for storyboards, game assets
  • Realistic Imagery: Raw mode for candid photography-like output
  • Batch Content Production: Fast turnarounds (≤10s/image)
  • Aspect Ratio Versatility: Suitable for social media, banners, posters

‍

How to use Flux pro 1.1 ultra API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to blackforestlabs/flux-pro-1.1-ultra.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/images/generations",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "blackforestlabs/flux-pro-1.1-ultra",
      "prompt": "A cat holding a sign that says hello"
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "blackforestlabs/flux-pro-1.1-ultra",
    "prompt": "A cat holding a sign that says hello"
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/images/generations \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"blackforestlabs/flux-pro-1.1-ultra","prompt":"A cat holding a sign that says hello"}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Flux pro 1.1 ultra API Pricing

TypePrice
Output
$0.06 / gen (variable)

Flux pro 1.1 ultra vs other models

ModelInputOutputContextBest for
$0.06 / gen (variable)
Image generation at scale
$0.25 / 1M tokens
$60 / 1M tokens
128K tokens
Image generation at scale
$5 / 1M tokens
$30 / 1M tokens
Image generation at scale
$0.25 / gen
Image generation at scale
$0.015 / MP (variable)
Image generation at scale

Frequently asked questions

Flux pro 1.1 ultra takes image, text as input and returns image.

Flux pro 1.1 ultra became available on June 12, 2026.

Flux pro 1.1 ultra is priced at $0.078 / gen (variable).

Flux pro 1.1 ultra is billed per generation — a fixed charge per output rather than by prompt length.

Yes, Flux pro 1.1 ultra accepts image input as well as a text prompt.

Flux pro 1.1 ultra was built by Black Forest Labs.

Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-pro-1.1-ultra as the model id.

Yes. Flux pro 1.1 ultra is served through AI/ML API, so the same key and endpoint format used for other models applies.

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