FLUX 3 Image Klein Online: Generate Images, Then Make Them Move
FLUX 3 Image Klein, or FLUX.3 Klein, is the small open-weight model Black Forest Labs released on October 15, 2026: 5.6B parameters, a built-in prompt expander and native 4K output. Type a short idea here and get a finished image, with no ComfyUI, no gated download and no GPU, then animate it in the same box.
- 5.6B open weights
- Prompt expansion built in
- 1K, 2K and native 4K
- Posters and infographics
- Runs locally from 8 GB (INT8)
- Image to video in one click
Sexually explicit (NSFW) content is strictly prohibited.
FLUX.3 Klein is selected. Every prompt is first expanded into a detailed caption, as Black Forest Labs recommends, so a short line is enough. Other image and video models are in the same list.
What is FLUX 3 Image Klein?
FLUX 3 Image Klein is the compact member of Black Forest Labs’ FLUX 3 family, released with open weights on October 15, 2026. One 5.6B image transformer does text to image, editing a single photo and composing from up to ten reference images, and it can place elements inside boxes you draw. It reads prompts through a Qwen3-VL 4B text encoder and decodes with the FLUX.2 VAE.
It is trained on long, detailed captions, so BFL ships it with “pup”, a 9B prompt expander that turns a short line into such a caption, and advises against running the model without it. Dolai keeps expansion on, which is why the one-line prompts in the examples below work.
BFL reports that Klein beats its 9B predecessor, FLUX.2 [klein], by 91 Elo on text to image and 70 on editing with 38% fewer parameters. Those are BFL’s own tests. Early users praise its posters, infographics and textures, and note that very small text can still come out wrong.
- Maker
- Black Forest Labs
- Released
- October 15, 2026
- Size
- 5.6B image transformer + Qwen3-VL 4B text encoder
- Versions
- Klein (distilled, 16 steps) and Klein Base (50 steps)
- Output
- Up to native 4K
- License
- FLUX Kommunity License
FLUX 3 Klein examples with prompts
Fifty-three images Black Forest Labs and fal published with FLUX 3 Image Klein: photography, portraits, art styles, lettering, infographics and craft. Copy a prompt, or press Use this prompt to load it into the box above.
A man walking with his dog, afternoon sun
Source: Black Forest Labs on GitHub
a letterpress gig poster on cream stock, wood type: 'THE LOW TIDES' very large at the top, below it 'with special guests' small, then 'MOTH LIGHT' and 'HARBOUR SOUND' medium, at the bottom 'Saturday 21 March, Doors 8pm, The Old Chapel, Margate' and 'Tickets 12 pounds' in small caps, two inks, black and brick red, nothing else written
Source: Black Forest Labs on GitHub
a 1960s cereal box, 'MORNING OATS' in bold rounded letters, 'with real honey' in a banner, a cartoon bear holding a spoon, 'NET WT 16 OZ' at the bottom corner and 'A good start to the day' in script, flat colours, photographed straight on
Source: Black Forest Labs on GitHub
an open field notebook on a wooden table, handwritten in pencil: the heading 'Lake Vyrnwy, 14 October', then the lines 'wind NW, light', 'two herons on the far shore', 'water 9 degrees', 'the fog lifted at ten', a small pencil sketch of a heron, a pressed leaf, nothing else written
Source: Black Forest Labs on GitHub
a tea tin, dark green enamel: 'HIGHLAND BREAKFAST' in gold caps on the front, 'Assam and Ceylon leaf' beneath, 'est. 1884' in a roundel, and on the side in small white type 'Brew for four minutes. One spoon per cup and one for the pot.', hard side light, product photograph
Source: Black Forest Labs on GitHub
double exposure portrait: a young East Asian man facing the camera, a larger translucent profile of him facing left layered over him, muted blues, film grain, silver hoop earring
Source: Black Forest Labs on GitHub
the interior of a brutalist concrete church, one slot of daylight falling on raw concrete, an empty wooden pew, dust in the light, 4x5 large format photograph
Source: Black Forest Labs on GitHub
fashion editorial, a model in an oversized grey wool coat against a mustard seamless, one hard key light from the left, crisp shadow on the paper, hands in pockets, Hasselblad, no text
Source: Black Forest Labs on GitHub
a woodblock print of sudden rain over a wooden bridge, Hiroshige register, indigo and sumi, the rain as fine parallel lines, figures under umbrellas, no text
Source: Black Forest Labs on GitHub
Macro photograph of a chunky knitted soft sculpture diorama, lit by a low, directional light source from the left that casts long, deep shadows across the textures. Filling the upper background is a dark indigo knitted backdrop. Across the lower third, a chaotic bed of thick looped yarn forms a churning sea. Rising from this base are three massive, conical icebergs constructed of stark white cable-knit yarn, positioned in a rhythmic frontal row: one on the left <iceberg_1>, a slightly taller one on the right <iceberg_2>, and a bulky central peak <iceberg_3>. Clinging to the slopes of the outer icebergs is a rhythmic repetition of tiny, identical pale blue knitted houses. Suspended in the upper frame between the peaks is a slightly curling strip of cream-colored stockinette fabric, bearing thick embroidered text <En_Text_1>. Disrupting the icy white and blue palette, a giant, vibrant magenta knitted whale tail <whale_tail_1> bursts vertically from the center of the teal sea, its thick ribbed surface covered in a halo of stray wool fibers illuminated by the raking light.
Source: Black Forest Labs on GitHub
a risograph poster in two inks, fluorescent orange and blue, slightly misregistered, a swimmer mid-dive in flat shapes, the word 'LIDO' large at the bottom, no other text
Source: Black Forest Labs on GitHub
a still life photographed in the register of a Dutch painting: a torn loaf, a pewter jug, three lemons with one peeled in a spiral, a knife, on a dark oak table, one window light from the left, black background, 4x5 large format
Source: Black Forest Labs on GitHub
Formula 1 cars race along a curved desert track at dusk, a packed grandstand on the right, the Sphinx and the pyramids of Giza rising through the haze behind them. Warm golden light, peach and lavender sky, high-angle shot, 1990s film photograph with fine grain.
Source: Black Forest Labs docs
A silhouette of a helicopter flying against a backdrop of softly undulating hills during a vivid orange sunset, casting a serene glow. The horizon is lined with subtle trees and shapes, creating a peaceful, atmospheric scene.
Source: Black Forest Labs docs
Aerial drone photograph of a braided glacial river delta in Iceland, turquoise channels weaving through black sand, overcast soft light.
Source: Black Forest Labs docs
Fashion editorial: a model in an oversized mustard trench coat stands on a windswept white salt flat, the coat blowing sideways, low sun casting a long shadow, minimal composition, medium format photograph.
Source: Black Forest Labs docs
A night market in Taipei: steam rises from a dumpling stall as a cook in a white apron lifts a bamboo steamer lid, neon signs reflect on the wet pavement, people browsing in the background, handheld 35mm film photograph with slight grain.
Source: Black Forest Labs docs
Macro photograph of a jumping spider perched on a fern frond covered in morning dew drops, its large iridescent front eyes in razor-sharp focus, fine hairs visible, soft green bokeh background, 100mm macro lens.
Source: Black Forest Labs docs
Art deco travel poster of a streamlined train crossing a coastal stone viaduct, bold text "RIVIERA EXPRESS", gold and navy geometric sunburst.
Source: Black Forest Labs docs
Stained glass window of an owl in front of a full moon, thick black lead lines, jewel-toned glass in sapphire, amber and emerald, light shining through.
Source: Black Forest Labs docs
Isometric 3D diorama of a tiny two-story bookshop with a reading nook, warm interior lights glowing through the windows, miniature tilt-shift look, clean background.
Source: Black Forest Labs docs
16-bit pixel art of a ramen shop street at night in the rain, glowing paper lanterns, a cat sheltering under an awning, limited color palette, crisp pixels.
Source: Black Forest Labs docs
Ukiyo-e print of a lighthouse keeper in a storm
Source: Black Forest Labs
Portrait of a woman in a denim jacket against orange
Source: Black Forest Labs
A red book cover reading Design Harder
Source: Black Forest Labs
A freediver gliding above a coral reef
Source: Black Forest Labs
An eagle hunter holding a golden eagle at golden hour
Source: Black Forest Labs
Portrait of a young man in an olive bomber against teal tiles
Source: Black Forest Labs
Black-and-white portrait of a man smoking a cigarette
Source: Black Forest Labs
Byzantine mosaic of a peacock in blue and gold
Source: Black Forest Labs
A navy postage stamp with a white long-haired cat under a gold crescent moon, the text 日本 INTERNATIONAL POSTAGE STAMP, the year 1959 and the kanji 猫
Source: Black Forest Labs
A red fox asleep in a vintage suitcase on a train
Source: Black Forest Labs
A woman in a pink dress against a cream wall
Source: Black Forest Labs
Low-key portrait of an old bearded man
Source: Black Forest Labs
A snow leopard resting on a rocky ledge
Source: Black Forest Labs
A figure in red floating among rainbow pinwheels
Source: Black Forest Labs
Cross-stitch hummingbird and hibiscus in an embroidery hoop
Source: Black Forest Labs
Claymation astronaut planting a flower on the moon
Source: Black Forest Labs
Red and black linocut of a fox leaping a fence
Source: Black Forest Labs
Collage illustration of a footballer in a yellow number 9 shirt
Source: Black Forest Labs
Anime pilot in front of a giant mecha in a hangar
Source: Black Forest Labs
Neon sign of a cat holding a coffee cup on a brick wall
Source: Black Forest Labs
Needle-felted hedgehog in a mushroom forest
Source: Black Forest Labs
Anime figure with a clear umbrella in a neon street
Source: Black Forest Labs
Charcoal sketch of an old boxer with taped hands
Source: Black Forest Labs
Miso ramen recipe infographic in four steps
Source: Black Forest Labs
Illustrated sign reading LET IT GO
Source: Black Forest Labs
Vintage seed packet reading HEIRLOOM TOMATO Black Krim
Source: Black Forest Labs
Overlapping colourful letters spelling House
Source: Black Forest Labs
Timeline infographic: a short history of flight
Source: Black Forest Labs
The water cycle infographic
Source: Black Forest Labs
How coffee gets to your cup, in five steps
Source: Black Forest Labs
A flat front-facing finished art exhibition poster on warm ivory paper, all edges inside the frame. At lower right, a sculptural transparent cobalt glass arch beside a tangerine sphere with crisp shadows. Bold expressive typographic layout fills most of the page. Giant dramatic condensed high-contrast serif title in navy and vermilion reads "FORM & FEELING". Below, a flowing hand-lettered coral script reads "New ways of seeing". A clean aligned column in large readable type contains exactly these six lines: "DESIGN EXHIBITION", "12-28 NOVEMBER 2026", "THE GLASS HOUSE", "Objects, spaces and stories", "OPEN DAILY 10:00-19:00", "TICKETS AT THE DOOR". Footer line in clearly readable type: "CURATED BY STUDIO COMMON". Each listed phrase appears once. Only these exact words, no extra text, no tiny filler lettering. Deliberate asymmetric Swiss editorial grid, confident color, sculptural still life, expressive font contrast, refined art book design.
Source: fal.aiWhat FLUX 3 Klein editing looks like
The same model edits photos from a plain instruction, keeping what you do not mention. These six are Black Forest Labs’ own before-and-after pairs.
Before
AfterTurn this summer street into winter after light snowfall.
Source: Black Forest Labs
Before
AfterFreeze the waterfall into blue-white ice and long icicles.
Source: Black Forest Labs
Before
AfterTie a small red bandana around the dog's neck.
Source: Black Forest Labs
Before
AfterPut the convertible on an empty desert road under a clear sky.
Source: Black Forest Labs
Before
AfterAdd a small caravan of three camels along the dune ridge.
Source: Black Forest Labs
Before
AfterAdd broad crimson stripes across the sails.
Source: Black Forest LabsDolai’s box runs FLUX 3 Image Klein as text to image for now; editing with your own reference images is coming to the studio.
FLUX 3 Klein vs FLUX.2 Klein
FLUX.2 [klein] came out in January 2026. The new Klein is one smaller model that does more, under a stricter license.
| FLUX 3 Image Klein | FLUX.2 [klein] | |
|---|---|---|
| Released | October 15, 2026 | January 15, 2026 |
| Sizes | One, 5.6B | Two, 4B and 9B |
| Steps (distilled) | 16 | 4 |
| Prompt expansion | Built in, recommended | None; write long prompts |
| Reference images | Up to 10 | Multi-reference editing |
| Layout boxes | Yes | No |
| Resolution | Up to native 4K | About 1 to 4 megapixels |
| License | Free commercial use under US$5M annual revenue | 4B Apache 2.0; 9B non-commercial |
| On Dolai | Available | Not served |
Quality gains are from Black Forest Labs’ own tests. The license change matters for larger companies: FLUX.2 [klein] 4B is still the fully open option. On Dolai, FLUX.3 Klein costs 5 credits per image at 1K, 19 at 2K and 76 at 4K.
Running FLUX 3 Klein locally
The weights are on Hugging Face (black-forest-labs/flux-3-image-klein, gated behind the license) and ComfyUI supports them natively from version 0.41.0 with four official templates. The generator is about 11 GB in BF16 and 5.6 GB in FP8, and the INT8 build runs on 8 GB RTX cards. Budget extra memory for the 9B prompt expander, or run it separately: without it, short prompts give noticeably weaker images.
No GPU, or no room for the expander? The box at the top of this page runs FLUX 3 Image Klein with expansion in the cloud. Create with FLUX 3 Klein
From a FLUX 3 Klein image to a video
FLUX 3 Image Klein makes stills. To make one move, switch the box above to Video, attach the image as the first frame and describe the motion. Seedance 2.5 keeps the layout, lettering and colours of the still and adds camera movement and sound.
Posters, product shots and infographics make good first frames: the design is already right, so the video only has to animate it.
What people make with FLUX 3 Klein
Posters and covers
Gig posters, book covers and travel prints with the headline spelled right.
Infographics
Recipe steps, timelines and explainers laid out as one finished graphic.
Packaging and mockups
Tins, seed packets and boxes with your product name on them.
Photography
Wildlife, travel, macro and editorial portraits at up to 4K.
Art styles and craft
Woodblock, linocut, stained glass, cross-stitch, claymation and pixel art.
Short videos
A FLUX 3 Klein still as the first frame of a Seedance clip, in the same box.
How to use FLUX 3 Image Klein online
- 1
Describe the image
One line is enough, since the prompt is expanded for you. Or press Use this prompt on any example above.
- 2
Pick a size
FLUX.3 Klein is selected. Choose an aspect ratio and 1K, 2K or 4K; the price is on the button.
- 3
Create, then animate
The image opens in the studio, where you can download it, adjust the prompt, or bring it back here as the first frame of a video.
FLUX 3 Image Klein FAQ
What is FLUX 3 Image Klein?
FLUX 3 Image Klein (also written FLUX.3 Klein) is an open-weight image model from Black Forest Labs, released on October 15, 2026. A single 5.6B model handles text to image, editing and up to ten reference images, with optional layout boxes and output up to 4K.
Can I use FLUX 3 Klein online for free?
Yes. The box at the top of this page runs it in the cloud with prompt expansion on. An image costs 5 credits at 1K, 19 at 2K and 76 at 4K, and new accounts get 100 free credits to start.
Can I use FLUX 3 Klein commercially?
Only within its license. The weights come under the FLUX Kommunity License: individuals and companies with less than US$5 million in annual revenue may use them commercially for free. Larger companies need a separate self-hosting license from Black Forest Labs or must use a paid API. Under any license, outputs may not be used to train competing image models.
Is FLUX 3 Klein open source?
It is open weight, not open source in the strict sense: anyone can download it from Hugging Face after accepting the FLUX Kommunity License, but the license limits free commercial use to those under US$5 million in annual revenue. FLUX.2 [klein] 4B remains the Apache 2.0 option.
What is the difference between FLUX 3 Klein and FLUX.2 Klein?
FLUX 3 Image Klein is one 5.6B model that adds a built-in prompt expander, up to ten reference images, layout boxes and native 4K, and scores higher in BFL’s tests. FLUX.2 [klein] came in 4B and 9B sizes, draws in 4 steps, and its 4B version has the looser Apache 2.0 license.
Why does FLUX 3 Klein need a prompt upsampler?
It was trained on long, detailed captions, so a short prompt on its own gives weaker images. The upsampler rewrites your line into such a caption before the model draws. Dolai does this for every prompt, so you can write as little or as much as you like.
How much VRAM does FLUX 3 Klein need?
The INT8 build runs on 8 GB RTX cards, and the FP8 generator weights are about 5.6 GB. The 9B prompt expander needs memory of its own, so a full local setup with expansion asks for more than 8 GB unless you run the expander separately.
Can FLUX 3 Klein render text?
Yes, headlines and labels come out well, as the poster and packaging examples show. Very small print can still be misspelled or warped, so keep important text large and put it in quotes.
Can I edit images with FLUX 3 Klein on Dolai?
Not yet. The model itself edits photos and combines up to ten references, as the before-and-after examples show, but Dolai’s box runs it as text to image for now. Editing with your own images is coming to the studio.
Is Dolai made by Black Forest Labs?
No. Dolai is an independent AI studio that runs FLUX 3 Image Klein through a hosted API, alongside image and video models from Google, OpenAI, ByteDance, Krea AI and others. FLUX 3 Image Klein is developed and released by Black Forest Labs.
Try FLUX 3 Image Klein now
One line in, a finished image out, up to 4K, and a video one click away.
Create with FLUX 3 KleinDolai is not affiliated with Black Forest Labs. FLUX 3 Image Klein is developed and released by Black Forest Labs. The examples on this page were published by Black Forest Labs and fal.ai, and link to their sources.
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