FLUX 1.1 [pro]
FLUX 1.1 Pro is Black Forest Labs' latest AI image generation model, delivering six times faster generation speeds and superior image quality with enhanced prompt accuracy.
Black Forest Labs High-resolution text-to-image generation at speed
FLUX 1.1 [pro] is a text-to-image generation model developed by Black Forest Labs, the team behind the FLUX model family. It accepts detailed text prompts and produces images at resolutions up to 2K and 4 megapixels, with support for aspect ratios including 1:1, 16:9, 9:16, 4:3, and 3:4. The model represents an upgrade over FLUX 1.0 [pro], delivering generation speeds approximately six times faster and improved adherence to the content and structure described in user prompts.
FLUX 1.1 [pro] is designed for use cases that require high visual fidelity from text descriptions, including illustrations, advertising visuals, concept art, portraits, and photorealistic scenes. It is accessible via API, making it suitable for developers integrating image generation into applications, as well as for graphic designers and visual marketers working in professional workflows. A 4-megapixel image can be generated in approximately 10 seconds.
What FLUX 1.1 [pro] supports
Text-to-Image Generation
Converts detailed text prompts into images across a range of styles, including photorealistic, illustrative, and concept art. Supports prompts up to a 10,000-character context window.
High-Resolution Output
Generates images at resolutions up to 2K and 4 megapixels. A 4MP image can be produced in approximately 10 seconds.
Fast Generation Speed
Produces images approximately six times faster than FLUX 1.0 [pro], reducing wait times in professional and API-driven workflows.
Flexible Aspect Ratios
Supports multiple aspect ratios — 1:1, 16:9, 9:16, 4:3, and 3:4 — selectable via input controls to match different creative formats.
Seed Control
Accepts a seed value as an input parameter, allowing users to reproduce specific image outputs or iterate on a consistent visual starting point.
Prompt Adherence
Applies improved prompt-following accuracy compared to the prior FLUX [pro] version, producing outputs that more closely reflect the details specified in the input text.
API Integration
Available via API for developers building image generation into applications, with Black Forest Labs providing official access through their platform.
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Get Started FreeCommon questions about FLUX 1.1 [pro]
What is the context window for FLUX 1.1 [pro]?
The model has a context window of 10,000 characters, which applies to the text prompt input used to describe the image to be generated.
What output resolutions does FLUX 1.1 [pro] support?
The model supports image output up to 2K resolution and 4 megapixels. It also supports multiple aspect ratios including 1:1, 16:9, 9:16, 4:3, and 3:4.
How fast does FLUX 1.1 [pro] generate images?
The model generates images approximately six times faster than FLUX 1.0 [pro]. A 4-megapixel image can be produced in approximately 10 seconds.
Is there a training data cutoff date for FLUX 1.1 [pro]?
A specific training data cutoff date is not listed in the available metadata for this model.
Can I control reproducibility of image outputs?
Yes. The model accepts a seed value as an input parameter, which allows you to reproduce a specific image output or iterate from a consistent starting point.
Who developed FLUX 1.1 [pro] and how can I access it?
FLUX 1.1 [pro] was developed by Black Forest Labs. It is accessible via API through Black Forest Labs and is available on MindStudio without requiring separate API keys.
What people think about FLUX 1.1 [pro]
Community discussion around FLUX 1.1 [pro] on Reddit reflects recognition of its standing among image generation models, with one thread noting its placement alongside Imagen 3 v2 on the Artificial Analysis benchmark leaderboard. Users in that thread appear to treat it as a reference point when evaluating newer models entering the space.
A separate thread indicates that Black Forest Labs is already preparing a successor model, FLUX.2 [pro], suggesting some community interest in what comes next rather than extended focus on the current version. No significant technical complaints or workflow-specific limitations were surfaced in the available threads.
Black Forest Labs is preparing to release FLUX.2 [pro] soon
New 4o Image Generation ranks #3 on Artificial Analysis, similar to Imagen 3 v2 and Flux 1.1 pro. Reve (Halfmoon) #1, Recraft V3 #2.
Parameters & options
A specific value that is used to guide the 'randomness' of the generation.
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