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New — FLUX 3 Klein, the fast FLUX 3 image model

FLUX 3 Klein Fast FLUX 3 stills and photo edits

Write a prompt or upload up to 10 photos and say what to change. Get a still at 1K, 2K or 4K in under half a minute.

FLUX 3 Klein is the compact image model in Black Forest Labs' FLUX 3 family, built to be quick and cheap to run. It makes stills from text, changes one thing in a photo while keeping the rest, and combines several uploads into one scene. Make the still here, then use it as the start frame for FLUX 3 or FLUX 3 Max video.

  • Under half a minute per image in our tests
  • Edit or combine up to 10 uploaded photos
  • Words in quotes come out on posters and covers
  • Nine shapes from 9:21 to 21:9, at 1K, 2K or 4K
  • Use the still as a start frame for FLUX 3 video
FLUX 3 Klein combining two uploads — a model on a concrete step holding a frosted perfume bottle
HUMAN FRAGMENTS editorial poster sample

Create a 9:16 editorial poster in the HUMAN FRAGMENTS visual system. Theme: [surfing / basketball / boxing / cake decorating] Subject: [gender, age, appearance, outfit] Action: [specific movement or handcraft] Scene: [location and environment] Title: [custom two-word title] Supporting line: [one short phrase] Year: 2026 Use oversized cropped typography as the main structural framework. The letters should act as windows that reveal the surrounding environment, while the main person remains visually complete in front of the type. Do not let the letters cut through the face, torso, arms, thighs, or other important parts of the body. Let one key action element break beyond the typography to create strong depth: 1. WAVE CUT — a surfer carving across a rising wave, with the board nose, hand, water spray, and curled wave breaking outside the letters. 2. RIM RISE — a basketball player reaching toward the hoop from a camera placed above the rim, with the basketball, hand, and hoop fully outside the letter masks and aligned naturally. 3. IMPACT FRAME — a boxer throwing a straight punch toward the camera, with the foreground glove enlarged and breaking beyond the typography while the gym remains inside the letters. 4. SOFT SWIRL — a graceful young woman decorating a cake, with the piping bag, hands, cake, and cream details extending beyond the letters while the bakery interior appears inside the type. Use realistic photography, believable anatomy, natural skin texture, strong foreground perspective, subtle paper grain, a warm off-white background, restrained colors, and clean editorial spacing. Keep the text minimal and freely placed: [Title] HUMAN FRAGMENTS [Short supporting line] 2026

Create a 9:16 editorial poster in the HUMAN FRAGMENTS visual system. Theme: [surfing / basketball / boxing / cake decorating] Subject: [gender, age, appearance, outfit] Action: [specific movement or handcraft] Scene: [location and environment] Title: [custom two-word title] Supporting line: [one short phrase] Year: 2026 Use oversized cropped typography as the main structural framework. The letters should act as windows that reveal the surrounding environment, while the main person remains visually complete in front of the type. Do not let the letters cut through the face, torso, arms, thighs, or other important parts of the body. Let one key action element break beyond the typography to create strong depth: 1. WAVE CUT — a surfer carving across a rising wave, with the board nose, hand, water spray, and curled wave breaking outside the letters. 2. RIM RISE — a basketball player reaching toward the hoop from a camera placed above the rim, with the basketball, hand, and hoop fully outside the letter masks and aligned naturally. 3. IMPACT FRAME — a boxer throwing a straight punch toward the camera, with the foreground glove enlarged and breaking beyond the typography while the gym remains inside the letters. 4. SOFT SWIRL — a graceful young woman decorating a cake, with the piping bag, hands, cake, and cream details extending beyond the letters while the bakery interior appears inside the type. Use realistic photography, believable anatomy, natural skin texture, strong foreground perspective, subtle paper grain, a warm off-white background, restrained colors, and clean editorial spacing. Keep the text minimal and freely placed: [Title] HUMAN FRAGMENTS [Short supporting line] 2026

What FLUX 3 Klein is

The image side of FLUX 3, sized for speed.

Black Forest Labs makes FLUX 3 as a family: video models for clips with sound, and image models for stills. FLUX 3 Klein is the compact, distilled image model, so a picture comes back quickly and costs only a few credits. It handles two jobs on this site. Text to image turns a written brief into a still. Image to image takes 1 to 10 photos you upload and follows a plain instruction: change the background, swap a piece of clothing, rewrite the words on a poster, or put the product from one photo into the hands of the person in another. Stills come out at 1K, 2K or 4K in nine shapes, from tall 9:21 to cinematic 21:9.

Image to image

FLUX 3 Klein edits from our tests

We made the first picture with FLUX 3 Klein, uploaded it, and ran the edit prompt. Each result is the first image it returned at 1K.

Studio stone → sunset beach

The same bottle standing on wet sand at a sunset beach

Original

Frosted perfume bottle with a brass cap on a travertine slab

Edit prompt

Keep the perfume bottle exactly as it is. Replace the background and stone with wet sand on a beach at golden hour sunset, soft waves behind, warm backlight.

Text to image

FLUX 3 Klein prompts you can run next

Our own first results at 1K. Copy a prompt into the generator, or change the subject and keep the style words.

Cream cafe poster reading PUMPKIN LATTE and Every morning from 7am, made with FLUX 3 Klein
1K · 3:4

Prompt

Cafe poster with two lines of text

Minimal autumn cafe poster. Large bold title text "PUMPKIN LATTE" at the top, a single ceramic cup with latte art centered, scattered maple leaves, cream background, small line "Every morning from 7am" at the bottom. Clean flat graphic design.

Use this prompt
Woman in a mustard raincoat laughing under a clear umbrella on a neon-lit wet street, made with FLUX 3 Klein
1K · 2:3

Prompt

Rainy street portrait with a film look

Candid street portrait of a young woman in a mustard raincoat laughing under a clear umbrella on a rainy Tokyo side street at dusk, neon reflections on wet asphalt, shallow depth of field, 35mm film look.

Use this prompt
Pastel isometric home office with a laptop, plants and a sleeping cat, made with FLUX 3 Klein
1K · 1:1

Prompt

Isometric 3D room

Cozy isometric 3D illustration of a tiny home office: desk with laptop, potted monstera, bookshelf, cat sleeping on a cushion, warm lamp light, pastel colors, soft shadows, clean render.

Use this prompt

Why FLUX 3 Klein

Quick stills, careful edits, ready for video

Four things that make FLUX 3 Klein the first image model to open on this site.

Fast and cheap enough to try many versions

Each of our test images came back in under half a minute, and a 1K still costs 2 credits. That changes how you work: write a brief, look, adjust one phrase, and run it again until the picture is right, then re-run the winner at 2K or 4K.

FLUX 3 Klein product shot of a frosted perfume bottle on travertine

Combine up to 10 photos in one picture

Upload a person, a product and a place, then say how they fit together. Call them "the first image", "the second image" and so on, in the order you uploaded them. Say what must not change — a face, a label, a pose — and FLUX 3 Klein builds the scene around it.

FLUX 3 Klein result combining a model photo and a perfume bottle photo

Words on posters, and new words on old ones

Put the text you want in quotes and FLUX 3 Klein sets it in the design, or rewrites the title on a poster you upload while the layout stays. Read every word before you publish, as with any image model.

Cafe poster edited by FLUX 3 Klein to read MAPLE MOCHA

A start frame for FLUX 3 video

Pick the shape of the clip you plan — 9:16 for Reels, 16:9 or 21:9 for widescreen — and make the opening still here. Then open FLUX 3 or FLUX 3 Max, switch to image to video and upload it, so the clip starts exactly where you want.

21:9 alpine lake still from FLUX 3 Klein, ready to use as a video start frame

The FLUX 3 family here

FLUX 3 Klein vs FLUX 3 and FLUX 3 Max

One family, three jobs. Start with a still, then move it.

This page FLUX 3 Klein Stills & photo edits Use FLUX 3 Klein
Video FLUX 3 Max Fast video with sound Open FLUX 3 Max
Video hub FLUX 3 Storyboards & video edit Open FLUX 3
Makes Still images 5–20 second clips with audio 5–20 second clips with audio
Start from Text, or 1–10 photos to edit or combine Text, or one photo plus an optional last frame Text, or 1–10 photos as a storyboard
Size 1K, 2K or 4K 720p or 1080p 720p or 1080p
Credits 2 at 1K, 3 at 2K, 6 at 4K per image 35 per second at 720p, 60 at 1080p 35 per second at 720p, 60 at 1080p
How it works

How to use FLUX 3 Klein in four steps

From a brief or a photo to a finished still.

  1. 1
    Write the brief

    Write the brief

    Describe the subject, the setting, the light and the style. Put any words that must appear in quotes.

  2. 2
    Upload photos to edit (optional)

    Upload photos to edit (optional)

    Add 1 to 10 photos and say what to change and what to keep. Refer to them by upload order.

  3. 3
    Pick size and shape

    Pick size and shape

    Start at 1K; 2K and 4K need a credit pack or plan. When you edit, Auto keeps the first photo's shape.

  4. 4
    Generate and refine

    Generate and refine

    Check the result in your library, adjust one phrase, and run again. Keep the take you like or send it to video.

Who it's for

Where FLUX 3 Klein fits

Jobs where you need many good stills quickly.

  • Product photos in new settings

    Shoot or generate one clean packshot, then place the same product on a beach, a desk or a kitchen counter with a sentence each.

  • Catalog and outfit variations

    Keep the model and pose and change one garment or color at a time to show a whole range.

  • Posters and social graphics

    Lay out a title and a short line in the exact shape each channel needs, then swap the words for the next post.

  • Start frames for video

    Lock the look of the first frame before you spend video credits on FLUX 3 or FLUX 3 Max.

  • Mood boards and concepts

    Try a dozen directions for the price of one premium image and keep the ones worth finishing at 4K.

  • Banners and wallpapers

    Make ultra-wide 21:9 website heroes and tall 9:16 or 9:21 phone backgrounds.

FLUX 3 Klein questions

What is FLUX 3 Klein?

FLUX 3 Klein is the compact image model in Black Forest Labs' FLUX 3 family. It makes stills from text and edits or combines photos you upload, at 1K, 2K or 4K, and it is built to be fast and low-cost.

How much does FLUX 3 Klein cost, and can I try it free?

A still costs 2 credits at 1K, 3 at 2K and 6 at 4K. New accounts get 25 free credits, enough for a dozen 1K tries. 2K, 4K and more than one image per run need a credit pack or plan.

How many photos can FLUX 3 Klein edit at once?

Up to 10. Upload them in the order you want to refer to them — "the first image", "the second image" — and describe how they should be changed or combined.

Which sizes and shapes can I choose?

1K, 2K or 4K, in nine shapes: 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9 and 9:21. When you edit, Auto keeps the shape of the first photo.

Can FLUX 3 Klein put text in an image?

Yes. Write the words in quotes, exactly as they should appear, and say where they go. It can also replace the words on a poster you upload. Check the spelling before you use the image.

Can I turn a FLUX 3 Klein still into a video?

Yes. Save the still, open FLUX 3 or FLUX 3 Max, switch to image to video and upload it as the first frame. Make the still in the shape you want the clip to have.

Can I write prompts in my own language?

Yes. Prompts can be in any language and up to 5,000 characters. For text inside the image, put the exact words in quotes.

Ready to try FLUX 3 Klein?

Write a brief or upload a photo and get a still in under half a minute.