FLUX 1.1 [pro] Ultra
A state-of-the-art AI image generation model that produces stunning high-resolution images from text descriptions with exceptional speed and creative control.
Black Forest Labs High-resolution text-to-image generation up to 4MP
FLUX 1.1 [pro] Ultra is a text-to-image generation model developed by Black Forest Labs. It produces images at resolutions up to 4 megapixels and is designed to closely follow text prompt instructions while maintaining image quality at high resolutions. The model offers two generation modes: Ultra mode, which prioritizes strict prompt adherence, and Raw mode, which produces a more naturalistic rendering with fewer synthetic-looking artifacts.
FLUX 1.1 [pro] Ultra is suited for professional and creative applications that require high-resolution output, such as concept art, print materials, and social media visuals. It is accessible via the Black Forest Labs API, making it straightforward to integrate into existing workflows and platforms. The model accepts a seed input for reproducible outputs alongside configurable generation settings.
What FLUX 1.1 [pro] Ultra supports
High-Resolution Output
Generates images up to 4 megapixels, providing fine detail suitable for print and professional visual production.
Prompt Adherence
Ultra mode maintains close fidelity to the input text prompt even at maximum resolution settings.
Raw Realism Mode
Raw mode produces a more organic, naturalistic rendering that reduces visually synthetic artifacts in the output image.
Seed-Based Reproducibility
Accepts a seed input so that the same prompt and seed value will produce a consistent, reproducible image output.
Configurable Generation
Exposes multiple select-type parameters allowing control over generation options such as mode, aspect ratio, and output format.
API Integration
Available through the Black Forest Labs API, enabling integration into external platforms and creative pipelines including ComfyUI.
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Get Started FreeCommon questions about FLUX 1.1 [pro] Ultra
What is the maximum output resolution for FLUX 1.1 [pro] Ultra?
FLUX 1.1 [pro] Ultra can generate images up to 4 megapixels, making it suitable for high-resolution professional and print use cases.
What is the context window for this model?
The model has a context window of 10,000 tokens, which governs the length of the text prompt it can process.
What is the difference between Ultra mode and Raw mode?
Ultra mode prioritizes strict adherence to the text prompt without sacrificing image quality. Raw mode produces a more natural, organic rendering that reduces synthetic-looking artifacts for a more realistic result.
Does FLUX 1.1 [pro] Ultra have a training data cutoff date?
A specific training data cutoff date is not provided in the available metadata for this model.
How can developers integrate FLUX 1.1 [pro] Ultra into their workflows?
The model is accessible via the Black Forest Labs API and has community-maintained integrations such as a ComfyUI plugin using the BFL API, allowing it to be embedded into existing creative and development pipelines.
Parameters & options
A specific value that is used to guide the 'randomness' of the generation.
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