FLUX1.1 [pro] ultra Text to Image
Input
Customize your input with more control.
Result
What would you like to do next?
Your request will cost $0.06 per image.
Images are billed by rounding up to the nearest megapixel.
Logs
FLUX1.1 [pro] ultra | [text-to-image]
Black Forest Labs' FLUX1.1 [pro] ultra delivers up to 2K resolution (4 megapixels) image generation at $0.06 per image. With 4x the resolution detail, this model extends FLUX1.1 [pro]'s capabilities with enhanced photorealism while maintaining ~10 second generation times. Built for production workflows where resolution and visual fidelity directly impact deliverables.
Use Cases: High-resolution marketing assets | Product photography | Editorial illustrations
Performance
At $0.06 per image with 4-megapixel output capability, FLUX1.1 [pro] ultra positions between standard-resolution alternatives and premium high-res solutions.
| Metric | Result | Context |
|---|---|---|
| Max Resolution | 4 megapixels (2048×2048) | 4x standard FLUX1.1 [pro] resolution |
| Inference Speed | ~10 seconds per sample | Ultra mode generation time from Black Forest Labs |
| Cost per Image | $0.06 | 16.7 images per $1.00 |
| Batch Generation | Up to 4 images | Parallel generation via `num_images` parameter |
| Related Endpoints | FLUX1.1 [pro], FLUX.1 Kontext [pro] | Standard resolution and context-aware variants |
Professional-Grade Resolution Without Compromise
FLUX1.1 [pro] ultra extends Black Forest Labs' architecture to 4-megapixel generation while maintaining the prompt interpretation and photorealism that defined the standard version. Where most high-resolution models sacrifice inference speed or introduce quality degradation, ultra mode processes at comparable latency to standard-resolution alternatives.
What this means for you:
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True 2K output: Generate up to 2048×2048 images without upscaling artifacts or post-processing, delivering print-ready assets directly from the API
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Optional image conditioning: Use
`image_url`and`image_prompt_strength`(0-1 range) to guide generation with reference images, enabling style transfer and composition control -
Flexible aspect ratios: Support for multiple aspect ratios with automatic megapixel-based billing, pay only for the resolution you actually use
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Granular safety controls: Six-level
`safety_tolerance`parameter (1-6) lets you calibrate content filtering for your specific use case, from strict (1) to permissive (6)
Technical Specifications
| Spec | Details |
|---|---|
| Architecture | FLUX1.1 [pro] ultra |
| Input Formats | Text prompts, optional reference images via URL |
| Output Formats | JPEG, PNG |
| Max Resolution | 4 megapixels (up to 2048×2048) |
| License | Commercial use enabled via fal partnership |
API Documentation | Quickstart Guide | Enterprise Pricing
How It Stacks Up
FLUX1.1 [pro] ($0.05) – FLUX1.1 [pro] ultra trades cost efficiency for 4x resolution at $0.06 vs $0.05 (20% premium). Standard FLUX1.1 [pro] remains ideal for high-volume workflows where 1-megapixel output meets requirements and cost per image is the primary constraint.
FLUX.1 Kontext [pro] ($0.05) – FLUX1.1 [pro] ultra prioritizes maximum resolution and photorealism for single-image generation. FLUX.1 Kontext [pro] emphasizes multi-image context understanding (up to 5 reference images) at standard resolution, optimized for workflows requiring consistent style or character preservation across generations.
AuraFlow ($0.012) – FLUX1.1 [pro] ultra delivers professional-grade photorealism and 4-megapixel output at 5x the cost ($0.06 vs $0.012). AuraFlow offers open-weight flexibility and cost efficiency for rapid iteration workflows where resolution and photorealism requirements are secondary to generation volume.