NewFLUX 3 Image Klein, released Oct 15, 2026
FLUX 3 Klein Online: Generate and Edit Images in Your Browser
Type a prompt or upload a photo, and FLUX 3 Klein makes the picture. You don't need a graphics card, ComfyUI or 11 GB of model files. The model runs online, and the image shows up in your browser.
5 free credits when you sign up, enough for five 1K images. Sign in to start generating.
- No GPU or install
- Up to 10 reference images
- Up to 4K output
JPEG, PNG or WebP, up to 10 MB each
Aspect ratio
Resolution
Features
What you can make
An image from a sentence
Describe the scene, the light and the style in a sentence or two. The model expects full scene descriptions, so a short list of keywords gives it less to work with.
"a corgi in a yellow raincoat on a rainy Tokyo side street at night, neon reflections, 35mm"
An edited photo
Say what to change: "Swap the mug for a glass of iced coffee." "Make it evening." The rest of the photo stays close to the original, which early Reddit testers liked most about this model.
One picture from many
Drop in up to 10 reference images, such as a product, a model, a background and a color swatch. Then ask for one picture that combines them.
4K
about 16 megapixels
Large prints
The model renders natively from 768 px up to 4K. Here you choose 1K, 2K or 4K, for 1, 2 or 4 credits per image.
How it works
How to use FLUX 3 Klein online
- 1
Write or upload
Type what you want, or upload the photo you want to change. Add reference images if you have them.
- 2
Pick a size and shape
Square for social posts, 16:9 for banners, 9:16 for stories.
- 3
Generate and download
Not quite right? Change one detail in the prompt and run it again.
studio photo of a matte black water bottle on a pale pink background, soft shadow
The model
What is FLUX 3 Image Klein?
FLUX 3 Image Klein is an image model from Black Forest Labs (BFL), the team behind the FLUX models. BFL released its weights to the public on October 15, 2026. It is the small, downloadable member of the FLUX 3 Image family, and one model does three jobs: it makes images from text, edits photos from an instruction, and combines several reference images.
Flux Klein Pro is an independent site. We run the model through a hosted API and are not affiliated with or endorsed by Black Forest Labs.
| Made by | Black Forest Labs |
|---|---|
| Released | October 15, 2026 (open weights) |
| Model size | 5.6 billion parameters (the image part only) |
| Inputs | A prompt plus up to 10 reference images |
| Output | One image, up to native 4K |
| Weights license | FLUX Kommunity License v1.0 |
Online vs local
Running it yourself vs using it here
You can download the weights and run the model on your own computer. That makes sense if you already own a strong graphics card and like to tinker. Here is what each route takes:
| Run it yourself | Use it here | |
|---|---|---|
| Hardware | An NVIDIA RTX card. BFL says a compressed (INT8) version runs on 8 GB cards. The full-size reference code uses about 31 GB at 1024 px. | Any laptop, tablet or phone with a browser |
| Setup | ComfyUI or Diffusers, plus a Hugging Face download that asks for your contact details | None |
| Cost | Your GPU and electricity | 5 free credits when you sign up. After that, 1 credit per 1K image, 2 per 2K and 4 per 4K. |
If you only want to see what FLUX 3 Klein can do, or you need a few images for a project this week, the online version skips all of the setup above.
Honest notes
Where it does well, and where it struggles
FLUX 3 Klein is at its best when you edit. You can change one thing in a photo and keep the rest close to the original, or blend several reference images into one scene.
It still gets some things wrong:
- Hands and bodies. Early Reddit testers report extra fingers and odd limbs in some text-to-image results. Running the same prompt again can help.
- Text in images. BFL's model card says rendered text may come out wrong, so check every letter before you use an image.
- Exact edits. Bounding boxes are a guide, not a hard mask, so the model may still change things near the box.
Tips: Describe the whole scene, not just the subject. Name the light, like "late afternoon sun from the left." When you edit, say what should stay the same as well as what should change.
Use cases
Who uses it
Online sellers put one product photo into ten different settings without booking a new shoot.
Social media managers: a week of post images that share one look, built from a few references.
Designers try out layouts and moods before opening Figma or Photoshop.
or just open a tab.
Anyone curious about the new model. Try FLUX 3 Klein here before you decide whether an 11 GB download and a new GPU are worth it.
Comparison
FLUX 3 Klein vs FLUX.2 Klein
FLUX.2 Klein came out in January 2026. Here is how the two models compare on paper:
| FLUX.2 Klein | FLUX 3 Image Klein | |
|---|---|---|
| Released | January 15, 2026 | October 15, 2026 |
| Model size | 4B and 9B | 5.6B |
| Reference images | Up to 4 | Up to 10 |
| Largest output | Up to 4 megapixels | Native 4K (about 16 megapixels) |
| Bounding boxes | Not listed | Yes |
| License | 4B: Apache 2.0. 9B: non-commercial | FLUX Kommunity License |
In BFL's own tests, FLUX 3 Klein scored 91 Elo points higher than FLUX.2 Klein 9B for text-to-image and 70 points higher for editing. (Elo is a head-to-head rating, like in chess.) These are company numbers, and no independent leaderboard has ranked the new model yet. Some early Reddit testers still got better text-to-image results from FLUX.2 Klein 9B, so it's worth trying your own prompts.
FAQ
What's new on this page
- — The generator at the top of the page now works: text-to-image and photo edits with up to 10 reference images, at 1K, 2K or 4K. New accounts get 5 free credits.
- — Rewrote the homepage for FLUX 3 Image Klein: model facts, running it locally vs online, known limits and a comparison with FLUX.2 Klein.
Try it in your browser
Write one sentence or upload one photo, and see what FLUX 3 Klein gives you back.