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.
Blackforestlabs
FLUX 1.1 [pro]
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.
A specific training data cutoff date is not listed in the available metadata for this model.
10K context
N/A output
Text-to-Image Generation
High-Resolution Output
Fast Generation Speed
Flexible Aspect Ratios
Seed Control
Prompt Adherence
Model Overview
High-signal model metadata in a structured two-column overview table.
Provider
The entity that provides this model.
Blackforestlabs
Input Context Window
The number of tokens supported by the input context window.
10K
tokens
Maximum Output Tokens
The number of tokens that can be generated by the model in a single request.
N/A
tokens
Open Source
Whether the model's code is available for public use.
No
Release Date
When the model was first released.
A specific training data cutoff date is not listed in the available metadata for this model.
Knowledge Cut-off Date
When the model's knowledge was last updated.
A specific training data cutoff date is not listed in the available metadata for this model.
API Providers
The providers that offer this model. This is not an exhaustive list.
Hugging Face
Modalities
Types of data this model can process.
Image
Text
What is FLUX 1.1 [pro]
A fuller summary of positioning, capabilities, and source-specific details for FLUX 1.1 [pro].
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.
Capabilities
What FLUX 1.1 [pro] supports
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.
Pricing for FLUX 1.1 [pro]
Primary API pricing shown in the same “quick compare” spirit as the reference page.
Input tokens
N/A
Per million tokens
Output tokens
N/A
Per million tokens
API Access & Providers
Places where this model is available, based on the synced detail-page metadata.
Hugging Face
Configuration & Parameters
The configurable options currently documented for this model.
Prompt Upsampling
SelectWidth
SelectHeight
SelectSeed
SeedA specific value that is used to guide the 'randomness' of the generation.
Supported Request Parameters
Parameters currently listed by OpenRouter or the local catalog for this model.
Resources & Documentation
Official model cards, release notes, docs, and other references synced from the source page.
FAQ
Common 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.
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