Blackforestlabs

FLUX.1 Kontext [max]

FLUX.1 Kontext [max] is an image generation and editing model developed by Black Forest Labs. It accepts image URLs, configuration selects, and seed inputs to support both generating new images from text prompts and editing existing images while preserving their original context and composition. A notable characteristic of the model is its ability to accurately render text within generated images, which has historically been a difficult task for image generation systems. It also supports multi-image input, allowing multiple reference images to guide the generation process. FLUX.1 Kontext [max] is the highest-tier variant in the Kontext model family from Black Forest Labs, positioned for workflows that require precise contextual understanding and high-fidelity output. It is suited for creative professionals, designers, and developers who need reliable image editing and generation within production pipelines. The model integrates with tools such as ComfyUI and MCP-compatible servers, and it carries a context window of 10,000 tokens. Its REMIX tag indicates support for remixing and transforming existing visual content.

Unknown 10,000 context N/A output
Contextual Image Editing Text-to-Image Generation In-Image Text Rendering Image Remixing Multi-Image Input Seed-Based Reproducibility

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.

10,000 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.

Unknown

Knowledge Cut-off Date

When the model's knowledge was last updated.

Unknown

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 Kontext [max]

A fuller summary of positioning, capabilities, and source-specific details for FLUX.1 Kontext [max].

FLUX.1 Kontext [max] is an image generation and editing model developed by Black Forest Labs. It accepts image URLs, configuration selects, and seed inputs to support both generating new images from text prompts and editing existing images while preserving their original context and composition. A notable characteristic of the model is its ability to accurately render text within generated images, which has historically been a difficult task for image generation systems. It also supports multi-image input, allowing multiple reference images to guide the generation process.

FLUX.1 Kontext [max] is the highest-tier variant in the Kontext model family from Black Forest Labs, positioned for workflows that require precise contextual understanding and high-fidelity output. It is suited for creative professionals, designers, and developers who need reliable image editing and generation within production pipelines. The model integrates with tools such as ComfyUI and MCP-compatible servers, and it carries a context window of 10,000 tokens. Its REMIX tag indicates support for remixing and transforming existing visual content.

Capabilities

What FLUX.1 Kontext [max] supports

CTX

Contextual Image Editing

Edits existing images while preserving their original composition and context, using an input image URL as a reference to guide targeted modifications.

IMG

Text-to-Image Generation

Generates new images from text prompts with a context window of 10,000 tokens, allowing detailed and nuanced prompt descriptions.

IMG

In-Image Text Rendering

Accurately renders legible text within generated or edited images, addressing a task that has historically challenged image generation models.

IMG

Image Remixing

Supports remixing existing visual content into new compositions, as indicated by the model's REMIX tag.

IMG

Multi-Image Input

Accepts multiple reference images as input, combining them to guide the generation or editing output toward a desired visual result.

AI

Seed-Based Reproducibility

Accepts a seed input parameter, enabling reproducible outputs by fixing the random state used during image generation.

Pricing for FLUX.1 Kontext [max]

Primary API pricing shown in the same “quick compare” spirit as the reference page.

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

Select
Default: true
On Off

Aspect Ratio

Select
Default: 16:9
21:9 18:9 16:9 4:3 3:2 1:1 2:3 3:4 9:16 9:18 9:21

Seed

Seed

A specific value that is used to guide the 'randomness' of the generation.

Range: 0 - 2147483647

Supported Request Parameters

Parameters currently listed by OpenRouter or the local catalog for this model.

Prompt Upsampling Aspect Ratio Seed

Resources & Documentation

Official model cards, release notes, docs, and other references synced from the source page.

Community discussion

What people think about FLUX.1 Kontext [max]

FLUX.1 Kontext [max] discussions are most active in r/FluxAI, r/comfyui, r/BlackForestLabs. Top Reddit threads cluster around benchmark and model-comparison threads.

The strongest match in this snapshot has 297 upvotes and 57 comments.

r/comfyui 1 comments August 2, 2025
Issue with Flux Kontext [Max] API

When using the Flux Kontext Max API, it functions correctly approximately 2 out of every 10 attempts. However, the majority of the time, I encounter errors—both during image generation and when trying to view the output.

[Error when Generating Images](https://preview.redd.it/8u9zmer4bngf1.jpg?width=2560&format=pjpg&auto=webp&s=05534da07281049141a3b64b93db610489270f7d)

[Error Sometimes when showing output](https://preview.redd.it/uptbl90bbngf1.jpg?width=2560&format=pjpg&auto=webp&s=06abccbc2f897f3a0b0e9004adf9bcb1a60c6334)

What are the possible causes of this issue, and how can it be resolved?

Open Reddit thread
r/BlackForestLabs 2 upvotes August 2, 2025
Issue with Flux Kontext [Max] API

When using the Flux Kontext Max API, it functions correctly approximately 2 out of every 10 attempts. However, the majority of the time, I encounter errors—both during image generation and when trying to view the output.

https://preview.redd.it/o2k3gravbngf1.jpg?width=2560&format=pjpg&auto=webp&s=62004b70e3c820101aa0e1d35eca278ff50aa8dc

https://preview.redd.it/i74r4zwvbngf1.jpg?width=2560&format=pjpg&auto=webp&s=3c714b7469d57158deb4731771d5a422548f5be7

What are the possible causes of this issue, and how can it be resolved?

Open Reddit thread
r/FluxAI 255 upvotes 16 comments June 4, 2025
A product shot using only Flux Kontext.

**Tools**:

Images generated using Flux Kontext Max. Videos made with Kling AI's new 2.1 model.

This video is not upscaled, but I did upscale the images with Magnific AI before I ran them through Kling AI.

**Prompts:**

Main video prompt structure I used for the videos in Kling AI:

A cinematic camera orbit around the sneaker, The camera moves slowly and intentionally, capturing the sneaker, Lighting shifts naturally as the orbit progresses, revealing surface textures like suede, Alcantara, and leather with precision. Subtle light flares and soft shadows, golden-hour editorial shoot. Fluid movements, lighting natural but stylized.

An example of a prompt I used for Flux Kontext Max:

Shoot the heel section at an angle, isolating the leather tab and stitch line. Use a macro lens to make every thread and fiber visible. Let the lighting softly highlight the curve of the back.

Cinematic, Macro Focus, 8K, Fashion Detail Editorial, Texture-Driven Product Shot.

Open Reddit thread
View more discussions →
FAQ

Common questions about FLUX.1 Kontext [max]

What is the context window for FLUX.1 Kontext [max]?

FLUX.1 Kontext [max] has a context window of 10,000 tokens, which allows for detailed text prompts when generating or editing images.

What input types does FLUX.1 Kontext [max] accept?

The model accepts image URLs, two select-type configuration parameters, and a seed value. This allows users to provide reference images, configure generation options, and control reproducibility.

What is the difference between FLUX.1 Kontext [max] and other Kontext variants?

FLUX.1 Kontext [max] is the highest-tier variant in the Kontext family from Black Forest Labs, designed for workflows requiring the highest fidelity and contextual understanding. Black Forest Labs also offers [pro] and [dev] variants in the Kontext lineup.

Does FLUX.1 Kontext [max] have a training data cutoff date?

The metadata for this model lists the training date as not available (n/a), so a specific training data cutoff date has not been publicly disclosed.

What tools and platforms does FLUX.1 Kontext [max] integrate with?

The model has documented integrations with ComfyUI via a custom node implementation and with MCP-compatible servers. It is also available through platforms like fal.ai.

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