Text to image
Elo · text-to-image arena
Flux pro 1.1 ultra overview
Flux pro 1.1 ultra by Black Forest Labs
Discover Flux 1.1 Pro Ultra by Black Forest Labs, an advanced AI image generator offering rapid high-resolution image creation for various applications.
Flux pro 1.1 ultra specs
- Model ID
blackforestlabs/flux-pro-1.1-ultra- Developer
- Black Forest Labs
- Input
- Text
- Output
- Text, Image
- Endpoint
POST https://api.aimlapi.com/v1/images/generations
Basic Information
- Model Name: Flux 1.1 Pro Ultra
- Developer/Creator: Black Forest Labs
- Release Date: November 6, 2024
- 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.
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.
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
Flux pro 1.1 ultra benchmarks by 
Artificial Analysis
Human-preference results for Flux pro 1.1 ultra in text to image, next to models available on AI/ML API. Data retrieved Nov 3, 2026.
AI/ML API price
USD per generation
Models on AI/ML API
Arena results for models you can call with the same API key.
Text to image
Blind pairwise human votes on images generated from text prompts. Flux pro 1.1 ultra ranks #85 of 98.
Flux pro 1.1 ultra API pricing
| Usage | Price | Unit |
|---|---|---|
| Image generation | $0.06 | per generation |
The final price depends on request parameters such as resolution or duration.
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Flux pro 1.1 ultra vs other image models: prices
AI/ML API rates for 5 models, per generation.
| Model | Per generation |
|---|---|
 Flux pro 1.1 ultra | $0.06 |
| FLUX.1 Dev | $0.025 |
| FLUX.1 Expand | $0.05 |
| FLUX.1 Fill | $0.05 |
 Grok Imagine Image Pro | $0.05 |
How to use the Flux pro 1.1 ultra API
View docs
Build with your agent
Give your agent the model details, code and documentation.
Paste it into your coding agent to build the integration.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl '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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "blackforestlabs/flux-pro-1.1-ultra",
"prompt": "A ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}
response = requests.post("https://api.aimlapi.com/v1/images/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = 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 ginger cat asleep on a stack of exactly three hardcover books in a rainy bookshop window at dusk. Gold lettering on the glass reads OPEN LATE. Warm lamp light inside, raindrops and blurred neon reflections outside, 35mm film photo."
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to Flux pro 1.1 ultra
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Flux pro 1.1 ultra FAQ
What inputs and outputs does Flux pro 1.1 ultra support?
Flux pro 1.1 ultra takes image, text as input and returns image.
When was Flux pro 1.1 ultra released?
Flux pro 1.1 ultra became available on June 12, 2026.
How much does Flux pro 1.1 ultra cost?
Flux pro 1.1 ultra costs $0.06 per generation on AI/ML API, billed as you go with no subscription.
How is Flux pro 1.1 ultra billed?
Flux pro 1.1 ultra is billed per generation, a fixed charge per output rather than by prompt length.
Can Flux pro 1.1 ultra take an existing image as input?
Yes, Flux pro 1.1 ultra accepts image input as well as a text prompt.
Who created Flux pro 1.1 ultra?
Flux pro 1.1 ultra was built by Black Forest Labs.
How do I call Flux pro 1.1 ultra on AI/ML API?
Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-pro-1.1-ultra as the model id.
Is Flux pro 1.1 ultra available through a single API key?
Yes. Flux pro 1.1 ultra is served through AI/ML API, so the same key and endpoint format used for other models applies.
What is the Flux pro 1.1 ultra model ID?
Use blackforestlabs/flux-pro-1.1-ultra as the model parameter. Requests go to https://api.aimlapi.com/v1/images/generations with your AI/ML API key.