What Is FLUX1.1 Pro Ultra?
FLUX1.1 Pro Ultra is the high-resolution member of the FLUX1.1 Pro line. It produces detailed 2K images, offers a less processed Raw mode and can use one image as visual guidance without switching to an unrelated model.
FLUX Model Versions
FLUX1.1 Pro Ultra
Raw mode · 2K
From 4 Credits
FLUX.2 Klein
Fastest · 1K
From 1 Credits
FLUX.2 Max
The highest-fidelity FLUX.2 tier for final-publish generation and demanding prompt adherence.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image, Typography
- Speed: Balanced
FLUX.2 Flex
FLUX.2 with explicit guidance and step controls for typography-heavy final renders.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Balanced
FLUX.2 Flash
A low-cost FLUX.2 route for rapid generation and exact multi-reference edits.
- Resolutions: 1K / 2K
- Reference images: up to 4
- Modes: Text to Image, Edit Image, Multi-reference
- Speed: Fastest
FLUX.2 Turbo
A fast FLUX.2 draft model with prompt expansion and unusually low megapixel cost.
- Resolutions: 1K / 2K
- Reference images: up to 4
- Modes: Text to Image, Image to Image, Edit Image, Multi-reference
- Speed: Fastest
FLUX.1 Kontext Max
The premium Kontext tier for typography, prompt adherence and identity-preserving edits.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Balanced
FLUX.1 Kontext Pro
Fast, context-aware generation and iterative editing from a single reference.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Fast
FLUX1.1 Pro Ultra
The high-resolution FLUX1.1 Pro tier for natural photography, detailed materials and reference-guided renders.
- Resolutions: 2K
- Reference images: up to 1
- Modes: Text to Image, Image to Image
- Speed: Balanced
FLUX1.1 Pro
The production FLUX1.1 endpoint for detailed photographic and material-rich final renders.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Balanced
FLUX.1 Dev
The tunable FLUX.1 development checkpoint for prompt experiments, seeded studies and controllable rendering.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Slow
FLUX.1 Schnell
The original open FLUX speed tier for rapid four-step concepts and inexpensive prompt batches.
- Resolutions: 1K
- Reference images: not supported
- Modes: Text to Image, Typography
- Speed: Fastest
FLUX.2
Realistic light and material detail, with every parameter exposed.
- Resolutions: 1K / 2K / 4K
- Reference images: up to 4
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Balanced
FLUX.2 Klein
The distilled FLUX.2: speed first, same visual language.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image
- Speed: Fastest
What Is FLUX1.1 Pro Ultra Best For?
- Natural-looking photography
- Material and product detail
- 2K hero images
- Single-reference visual direction
How to Use FLUX1.1 Pro Ultra
- Write the subject, lighting and camera treatment.
- Upload one reference when composition matters.
- Enable Raw for natural photography.
- Generate at the native 2K tier.
FLUX1.1 Pro Ultra Settings Explained
Raw Photo Mode
Reduces the polished synthetic look for more candid photographic texture.
Reference Strength
Start at 0.1; raise it only when the source composition must remain recognisable.
The panel above shows only the parameters FLUX1.1 Pro Ultra actually supports. Switch versions and unsupported controls disappear rather than sitting there doing nothing.
FLUX1.1 Pro Ultra Prompt Examples
Natural portrait
Editorial portrait beside a rain-streaked cafe window, natural skin texture, soft overcast light, 85mm lens, restrained colour grade
Reference direction
Keep the reference composition, replace the object with a brushed titanium speaker, soft studio reflections, premium product photography
FLUX1.1 Pro Ultra Test Results
Testing in progress
Every model runs the same eight-category prompt set — portrait, product, poster text, anime character, interior, multi-reference, image editing and character consistency — recording generation time, success rate, text accuracy and identity retention. That run has not finished for FLUX1.1 Pro Ultra, so this page shows no scores. We do not publish numbers we have not measured.
FLUX1.1 Pro Ultra Limitations
- The exact endpoint outputs its native 2K tier
- One reference image maximum
- Newer FLUX.2 models follow complex edits more closely
FLUX1.1 Pro Ultra Pricing and Credits
Credits scale with resolution and image count. The Generate button always shows what this run costs.
2K
4 credits / image
Failed generations cost 0 credits.
Commercial Use and Image Rights
Commercial use is subject to Black Forest Labs' model terms and the selected service terms.
- Model used: FLUX1.1 Pro Ultra
- Model developer: Black Forest Labs
- The inference route is managed internally and may change without changing the selected model
- Uploads are sent only to the configured inference service needed to complete the generation
- You can delete any generation from your history at any time
Frequently Asked Questions
How is this different from FLUX.2 Pro?+
Ultra is the high-resolution FLUX1.1 endpoint with Raw mode; FLUX.2 Pro is newer and better suited to complex multi-reference work.
Why is there only one resolution?+
The verified endpoint exposes aspect ratio but no separate resolution selector, so the page labels its native 2K output instead of inventing a tier.
Model Updates and Changelog
- 2026-08-25 —— Added the exact Pro Ultra generation and one-reference request mapping.
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