How Powerful is FLUX.1 Kontext? This Article Will Help You Quickly Understand the Practical Operation

In this era of AI-generated image tools, maintaining style consistency and character continuity in multiple rounds of editing has always been a "stuck point" in the minds of users. On May 29, Black Forest Labs released the new FLUX.1 Kontext, claiming that it can complete complex tasks such as image editing, generation, and style transfer through a unified model, finding a balance between accuracy and consistency. I conducted in-depth tests as soon as possible and compiled the results into this article, hoping to provide you with a reference for judging whether it is worth a try.

The conclusion is: it has shown the potential to solve problems in some scenarios, but its overall maturity needs to be improved. As long as it continues to be polished and optimized, there is still much room for improvement in efficiency in the future.

Core capabilities and advantages:

1. Unified model, multi-task adaptation

One model can complete local editing and context generation, adapting to a variety of image tasks.

2. Excellent consistency between characters and objects

Maintaining highly consistent character appearance in multiple rounds of editing, suitable for storyboard and series drawing production.

3. Quick response, high generation speed

Officially generates 1024x1024 images in 3-5 seconds; measured on Apple M4 Max device about 10 seconds.

4. Support iterative refinement modification

Supports multiple rounds of command fine-tuning, details are controllable, but too many iterations will still cause artifacts or image quality degradation.

5. Integration of multiple image transformation capabilities

Can change the subject and details, change the style, replace the background, keep the text style consistent (English), and each function can be used in combination.

6. High consistency and strong style transfer capability

When changing the style or synthesizing multiple images, it can still maintain image consistency well.

In summary, FLUX.1 Kontext can already perform many complex tasks in image editing and generation, and it does a good job, especially in character consistency and style transfer. Although the image details are slightly lost after multiple rounds of operations, its fast generation speed and support for continuous fine-tuning make it very suitable for content creation scenarios.

We can try it for free here (foreign website), and get 200 points: https://playground.bfl.ai/image/edit or use it in ComfyUI: https://www.comfy.org/zh-cn/

Then it can also be used on some other platforms: flux.1 kontext, Creatre Art, Freepik, Lightricks, OpenArt and LeonardoAI platforms all support FLUX.1 Kontext [max] and FLUX.1 Kontext [pro].

1. Object modification

Official tips and suggestions: Change [object] to [new state], keep [retain content] unchanged

Changing the color of the car really only changed this part, but the light shining into the car disappeared. Other than that, I can't find any flaws. This operation is perfect.

(Image source: Pinterest)

"The characters and scenery remain the same, the car in the background remains the same, only the color of the car is changed to black."

Here I changed a little girl with bad teeth to have white and nice teeth, and changed the gesture of the male protagonist to a thumbs up. You can see that the consistency is well maintained.

"The background remains unchanged, the braces on the little girl's teeth are removed to make the character's teeth look very white and nice, and the gesture of the male protagonist is changed to a thumbs-up."

Here I will modify the angle of a cartoon blind box IP of Labub, who has recently become popular. Pay attention to the overall details, whether it is facial expressions, clothing styles, even clothing folds, and character shadows, they are well kept as they are. However, when changing the background color, I don't know if the color of the clothes against the light blue background is a bit dark. 

"The background is changed to a blue gradient, and the rest remains unchanged."

"The rest remains unchanged, and Labub's fur color is changed to brown."

"The rest remains unchanged, and Labub changes a dress."

You no longer have to worry about passers-by intruding on your vacation photos, and you can also change to a passionate new background and post it directly on Instagram. Personally, I think the background change operation here is a bit unnatural, like a cutout.

"Keep the main person in the background, remove the rest of the passers-by, and change the background to Mount Fuji."

2. Style Transfer

Official Tips: Convert to [specific style] while keeping [composition/character/other] unchanged

I tried to transfer a picture to the other four styles. In this regard, I personally think that the details are still slightly inferior to chatgpt-4o, with many flaws and not beautiful.

"Transform the style into a watercolor style, cute, keeping the characters and background unchanged."

"Change the style to Japanese Ghibli style, keeping the characters and environment unchanged."

"Change the style to cartoon 3D clay texture style, keeping the characters and environment unchanged."

"Convert the style to a 16-bit mosaic pixel style, keeping the main character and background unchanged."

3. Background replacement

Official Tips: Change the background to [New Background], keeping the subject in exactly the same position and pose

I originally just wanted to change the background, but it turned out to be too monotonous, so I also tested the consistency of the characters. You can make small changes each time, but not too big changes. If you change too many times, the facial details will gradually become blurred.

I think this feature is good, but it requires you to describe it accurately and in detail, otherwise the result may be different from what you want.

"Keep the face completely unchanged. Position the subject for a passport-style headshot. Use a plain light grey or white background, even frontal lighting, and neutral facial expression. Hair neatly arranged, no shadows. Center the face in the frame."

"The character setting and background remain unchanged, The person Holding a bottle of cola up to the camera."

"Preserve facial structure.The character is playing the guitar, her gaze is lowered towards the guitar, leaving the back of her head for the audience, and the camera zooms in."

4. Text Editing

Official Tips: Replace '[Original]' with '[New]', keeping the same font style

Keep the font style unchanged, FROGiE replaced by FLUX.1 Kontext

A PLAYFULL FONT replaced by How powerful is

ALL CAPS CHARACTERS WITH 20 LIGATURES & MULTI LANGUAGES SUPPORTS replaced by This article will help you quickly understand the practical operation

5. Other supplements

5.1 Product background change

I would also like to add one more thing about products and IP. For example, if I have a hamburger, I can make some changes to the background and text.

"A 1950s American retro diner scene with black and white checkered floor tiles, shiny red leather booths, and a glowing neon sign in the background that reads "Hamburger". The hamburger, which has not yet been eaten, is steaming, with a small packet of ketchup and a red and white napkin next to it. The warm ambient light creates a nostalgic and inviting atmosphere."

"Keep the burger the same and change the background to the microwave in the kitchen."

5.2 Local details

Or when I have a photo of a person wearing clothes, I can directly let Kontext extract the clothes as a flat effect, or I can zoom in closer to show the fabric details based on the flat effect.

"No people, extract only the coat over a white background, product photography style."

5.3 Three Views

In terms of IP, you can let it directly output three views (the three views here are successful in one go):

 

Output front view, side view, rear view. The proportion remains unchanged.

Platform 1: FLUX Playground

Link (with 200 points free credits to try): https://playground.bfl.ai/image/edit

Generate function: This is basically the same as the generate function of general tools. I won’t go into details here.

Edit function:

Batch Size Batch size value: 1-4 The larger the value, the more images are output at one time. The recommended value for saving points is 1-2.

Safety Tolerance Safety tolerance value: 0-6 Meaning: The model's safety policy tolerance, which usually controls the sensitivity to inappropriate content. The larger the value, the wider the range of generated content, and the smaller the value, the less NSFW or offensive images can be generated.

Prompt Upsampling Prompt upsampling Meaning: refers to enhancing the influence of keywords or improving the resolution of understanding prompts. When turned on, it may make the main elements in the prompt words more prominent, but it may also cause the image composition to be over-concentrated.

Output Format Output format Output format: PNG/JPEG

Seed Seed Meaning: Controls the "random seed" for image generation. Pressing "Random" will generate a different image each time.

Click the small arrow icon to send, and you can see the output image after a while.

Fill function: Select the position to be filled, and then describe the elements to fill the position below.

Expand function: For example, upload a picture, adjust the size of the picture, and then add a description of the expanded part below.

Platform 2: Flux.1 kontext

Visit the website: https://fluxkontext.top/ and Try for free immediately

How to choose between the pro and max versions of FLUX.1 Kontext:

• FLUX.1 Kontext [pro]: Faster, slightly inferior to the max version in quality and detail, $0.04 per image (Comfy UI client price), more cost-effective.
• FLUX.1 Kontext [max]: Longer, better image quality, better image fidelity and detail expression, $0.08 per image (Comfy UI client price).

In addition, they have developed an open weight version, FLUX.1 Kontext [dev], which is a lightweight 12B diffusion Transformer, suitable for customization and compatible with the previous FLUX.1 [dev] inference code. This is an open FLUX.1 Kontext [dev] in the form of a private beta for research and security testing. If interested, please contact [email protected]

In general, the following problems and shortcomings still exist, which are also mentioned in the relevant papers of the Black Forest Laboratory, mainly including:

Image quality degradation after multiple rounds of editing: After multiple consecutive edits, the images generated by the model may have visual defects or artifacts, resulting in a decrease in overall image quality.

Insufficient accuracy of instruction follow-up: In a few cases, the model failed to strictly follow the user's instructions, and may misunderstand or ignore the specific requirements in the prompts.

Limitations of world knowledge: The "world knowledge" possessed by the model is still relatively limited, which may affect the accuracy and reliability of the output when dealing with generation tasks that rely on specific background or factual content.

Potential defects introduced by the distillation process: The distillation technology used in the training process may introduce visual defects to a certain extent, which in turn affects the fidelity and detail quality of the generated images.

Remember three core principles:

1. The focus of the prompt word: clarify which content needs to remain unchanged and which parts can be modified.
2. Gradually adjust: change only a small part at a time to avoid making too many changes at one time.
3. Use English prompt words: prompt words must be entered in English to ensure more accurate generation results.

Final words:

At present, it still has some limitations, such as detail loss after multiple rounds of editing, consistency deviation in some complex scenes, etc. But in terms of actual experience, it is enough to support the creation of medium and light visual content.

In the future, if the model continues to be optimized and the prompt structure is more intelligent, the efficiency and quality of AI creation are expected to take a step forward.

Interested friends may wish to give it a try: a picture and a prompt may be the starting point of creativity.