FLUX 1.1 Pro Ultra
Generate stunning, highly detailed images with FLUX 1.1 Pro Ultra — the premium tier of Black Forest Labs' acclaimed FLUX model family. Known for exceptional prompt adherence, intricate detail rendering, and versatile style capabilities, it's the go-to choice for professional-quality image generation.
Why It Looks Great
- Ultra-quality output: Premium tier delivers maximum detail, coherence, and visual fidelity.
- Exceptional prompt adherence: Accurately interprets complex, multi-element descriptions.
- Raw mode: Toggle for less processed, more natural-looking images.
- Intricate detail rendering: Excels at fine textures, ornate designs, and complex machinery.
- Flexible aspect ratios: Multiple format options for any use case.
- Prompt Enhancer: Built-in tool to refine and expand your descriptions automatically.
- Reproducible results: Use the seed parameter to recreate exact outputs.
Parameters
| Parameter | Required | Description |
|---|
| prompt | Yes | Text description of the image you want to generate. |
| aspect_ratio | No | Output format (e.g., 1:1, 16:9, 9:16). Default: 1:1. |
| output_format | No | File format: jpg or png. Default: jpg. |
| raw | No | Enable for less processed, more natural-looking images. |
| seed | No | Random seed for reproducibility. Leave empty for random. |
| enable_base64_output | No | API only: Returns base64 string instead of URL. |
How to Use
- Write your prompt — describe your image with rich details about subject, style, and atmosphere.
- Use Prompt Enhancer (optional) — click to automatically enrich your description.
- Choose aspect ratio — select the format that fits your needs.
- Select output format — choose jpg for smaller files or png for higher quality.
- Toggle raw mode (optional) — enable for more natural, less processed aesthetics.
- Set seed (optional) — for reproducible results.
- Run — click the button to generate.
- Download — preview and save your image.
Pricing
Flat rate per image generation.
Best Use Cases
- Concept Art & Illustration — Create detailed fantasy, sci-fi, and steampunk imagery.
- Product Visualization — Generate intricate product concepts with fine details.
- Architectural Rendering — Visualize ornate buildings and interior designs.
- Marketing & Advertising — Produce high-quality visuals for campaigns.
- Creative Exploration — Experiment with complex, multi-element compositions.
Example Prompts
- "A grand steampunk airship soaring through the sky, with intricate brass and copper details, large propellers spinning, and a massive balloon filled with hot air. The airship is adorned with Victorian-style architecture, featuring ornate railings and decorative elements."
- "Photorealistic portrait of an elderly craftsman in his workshop, warm natural lighting, detailed wood textures and tools in background"
- "Enchanted library with floating books, magical glowing orbs, spiral staircases reaching into infinite darkness, fantasy art style"
- "Futuristic motorcycle design with sleek aerodynamic curves, chrome and matte black finish, studio lighting"
- "Japanese zen garden at dawn, morning mist over raked sand patterns, moss-covered stones, cherry blossom petals falling"
Raw Mode Explained
| Setting | Result | Best For |
|---|
| Raw OFF (default) | More polished, vibrant, enhanced look | Marketing, social media, stylized content |
| Raw ON | Less processed, natural, organic feel | Photorealism, documentary style, authentic aesthetics |
Pro Tips for Best Results
- FLUX excels at intricate details — don't hesitate to describe ornate, complex elements.
- Include material descriptions: "brass and copper", "chrome finish", "weathered wood".
- Specify lighting conditions for more controlled outputs.
- Use raw mode when you want images that feel more like photographs than renders.
- Layer your descriptions: subject → details → environment → style → mood.
- The model handles long, detailed prompts exceptionally well — be descriptive!
Notes
- The enable_base64_output option is only available through the API.
- Generation time may vary based on prompt complexity and queue load.
- FLUX 1.1 Pro Ultra represents the highest quality tier in the FLUX family.
- Raw mode is particularly effective for portraits and natural scenes.