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Black Forest Labs' Flux.2 line

Run Flux.2 Klein in Your Browser

Klein 9B and 4B, plus the 2,100+ community models built on them. No 9-billion-parameter download, no GPU, no environment to keep alive.

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Images generated on Diffus
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The difference, not the spec sheet

Why Run Klein Here

The weights are open. What is not free is the disk, the card and the afternoon of setup.

2,100+ Klein Models, Already Hosted

Community checkpoints and LoRAs built on Klein 9B and 4B are on disk and selectable. Paste a Civitai link to add one that isn't.

Browse models

One Node, the Whole Workflow

Generate, edit, inpaint, outpaint and face swap from a single self-contained Klein node in ComfyUI — no graph to assemble before the first image.

Open ComfyUI

Compare It Against the Rest

Flux.1, Flux Kontext, Qwen, SDXL and SD 3.5 are in the same session. Run one prompt through several and keep what wins.

Start generating

Core capabilities

What You Can Do With It

Generation is the first step, not the whole job.

Prompt to picture

Text to Image on Klein

Prompt Klein 9B for quality or 4B when you want the lighter model, at the aspect ratio you need, with the sampler and guidance already tuned for the Flux.2 line.

Start generating
Selecting a Flux model on Diffus
Edit where you generate

Edit, Inpaint and Outpaint

The Klein node covers editing in the same place you generate — repaint a region, extend the frame, swap a face — without exporting and losing the parameters.

Open ComfyUI
Editing an image on Diffus
Bring your own LoRAs

Stack Community LoRAs

Klein has its own growing LoRA ecosystem on Civitai. Import one by URL and stack it, or fine-tune your own here and use it the moment training ends.

Browse models
A ComfyUI workflow on Diffus

How it works

Three Steps, No Setup

Nothing to download and no hardware to buy.

step 1

Pick Klein

Choose Klein 9B or 4B, or a community fine-tune built on either.

step 2

Write the Prompt

Or bring an image to edit — the same node handles both.

step 3

Generate and Refine

Inpaint, outpaint or upscale in place. Outputs land in your gallery.

Get started
Free creator tools

More Free Tools to Try

Single-purpose tools that need no setup. Describe it, click, done.

Flux 1 Image Generator

Text to image on the Flux.1 line, with community LoRAs.

Try for free

Flux Kontext Image Editor

Prompt-guided edits that keep character and style consistent.

Try for free

AI Image Generator

Text to image with community models, styles and aspect ratios.

Try for free
Explore the library

Models Built on Flux

Checkpoints and LoRAs across the Flux line, ready without a download.

Darkest Dungeon Styles + Character Pack IL&NoobAI | Shrekman Darkest Dungeon Loras DD2Style-V1
Bone Collector Barrel Lookdown _- IL -_ V1
A girl in a school uniform holding a teddy bear stands under a bright blue sky filled with clouds and musical notes, with utility poles in the background.
Cinematic Kodak Motion Picture "Film Still" Style XL + F1D + Illu + Pony + zit KodakMotionPicture XL v1
Cinematic Kodak Motion Picture "Film Still" Style XL + F1D + Illu + Pony + zit KodakMotionPicture XL v2
A giant girl wearing a floral skirt and crown, holding a Super Mario-style bomb, stands smiling crazily above a construction site with a large explosion below, rendered in pastel vaporwave and mixed media style.
Not Artists Styles for Pony Diffusion V6 XL Summer Days 2
[Style/Pony] RELSM - Semi Realism✨ v1.0
[Pony] Geekpower AI Styles SomethingWeird
Ariel (The Little Mermaid) Disney Princess - | Illustrious XL | XL PONY | SD 1.5 - by YeiyeiArt Ariel PONY XL V.
Close-up selfie of a woman wearing makeup in natural lighting with mountains and a sunset in the background
Vixon's Cute Styles - colourcore colourcore v1.0
Close-up portrait of a grimdark sci-fi figure wearing a heavily detailed gas mask with glowing green circular lenses, covered in religious symbols and tangled wires, holding a glowing mechanical relic cube.
Velvet's Mythic Fantasy Styles | Flux + Pony + illustrious + ZiT + Anima + Krea2 Pony Anime Illustrations
Not Artists Styles for Pony Diffusion V6 XL Smooth Anime [M]
A dynamic illustration of a girl in a floral summer dress throwing a baseball towards the viewer, set against an orange background with motion lines and dramatic perspective.
Cyberpunk android with a robotic arm standing in a steamy shower with rain falling, viewed through a wet glass panel, set against a futuristic city backdrop at night.
Photorealistic image of a Japanese girl with blue bob hair wearing a shiny white and black edgPlugsuit bodysuit sitting on a rooftop at sunset in Tokyo.
Steampunk woman wearing a corset dress and tiny top hat, holding an owl, standing framed in a riveted teal train doorway with cinematic low-key lighting.
Get inspirations

Made on Diffus

Work from the community, with the model and prompt behind every image.

A digital art scene of a mountain valley with snow and ice featuring a large metallic pink sphere floating above, illuminated by soft ethereal light and a solitary red-cloaked figure below.
Close-up portrait of a young woman with freckles, blue eyes, and natural makeup, wearing a black beret and gold hoop earrings in soft natural light.
Ink splash art of a female warrior in red samurai leather armor, shown in silhouette with intricate linework and chiaroscuro lighting, accompanied by Japanese kanji.
Silhouette of two people rowing a boat on a calm lake at sunset with city buildings and an orange sky reflecting on the water
A hyper-realistic chrome skull with a reflective silver and purple surface, mouth wide open revealing a glowing purple orb inside, set against a vantablack background with purple tint.
Hyper-realistic digital chrome skull with reflective metallic surface, molten lava erupting from eye sockets and mouth amid fiery orange glow.
Vector art of Shadow the Hedgehog standing on a rock in a detailed mountain landscape with a large full moon glowing in yellow behind snowy peaks, vibrant flowers in foreground.
A haunting figure with glowing eyes is cocooned in spiked chains within a dark, crimson-lit void surrounded by mist and shadows.
Close-up portrait of a slender fashion model with sharp cheekbones and flawless skin, wearing a sleek high-fashion top, shown with vivid glitch-style color fragments and cinematic lighting on a minimalist soft gray background.
A cyberpunk-style girl wearing a hooded jacket and headphones, with striped thigh-high socks and a choker, standing against a complex futuristic background with chromatic aberration effects.
Profile of a man's head rendered in gray tones with abstract white noise resembling hair, set against a white background.
Close-up of a faceless robot geisha with a smooth porcelain mask, dark hair styled in a bun adorned with gold flower ornaments, wearing an ornate floral-patterned kimono under dramatic volumetric lighting.
A decaying evil clown man wearing a fancy sparkly woman's hat, featuring vibrant colors, bold ink lines, and a watercolor wash on aged paper.
A fearsome chupacabra stands in a moonlit desert outfitted with high-tech survival gear including a hydration pack and sand goggles, depicted with bold ink lines and vibrant colors.
Modern cantilevered building with floor-to-ceiling glass walls illuminated by warm orange light, extending over ocean cliffs at dusk with fog and crashing waves below.
A highly detailed and hyper-realistic river landscape with a wooden cabin, rowboats on clear water, surrounded by lush forest and rocks, under a partly cloudy sky.
Digital illustration of medieval knights in armor standing and conversing in a sunlit forest, with a blonde woman in a blue dress holding a glass of wine.
Close-up of a small evil creature with horns restrained inside a glowing, translucent magic crystal surrounded by eerie light particles and a dark forest background.
A glowing bioluminescent waterfall cascading down from towering rocky mountains in a lush Pacific Northwest forest under a colorful sunset sky, with beams of light and surreal ethereal elements.
Close-up digital portrait of an alien woman with green skin and red eyes, featuring subtle mechanical elements and a cyberpunk workshop background in Gameboy-style green, white, and black palette.
Portrait of an elderly man with wrinkles and age spots, sitting with his hand on his face against a bluish-green blurred background, captured with dramatic lighting.
Dark silhouette of a person with abstract geometric gradients in gold and red, featuring moody lighting and a grainy film texture.
A young girl with long wavy brown hair wearing a light green dress gently cradles a large white goose with an orange beak against a soft dark green background.
A colossal dark tornado spirals down from a stormy twilight sky over farmland, with electric transfer towers lining the landscape under dramatic, cinematic lighting.
A highly detailed portrait of a bleached, human-like advanced female android dressed in ornate historical costume with golden armor and intricate embroidery, against a dark, atmospheric backdrop.
A dark, gothic magic forest illuminated by dramatic volumetric lighting with a lone cloaked figure standing before a giant ancient tree with a glowing doorway.
Oil painting of a lighthouse standing on a rocky cliff, with turbulent turquoise ocean waves below and a swirling sunset sky in Van Gogh style.
Macro photograph of blooming cherry blossoms swirling with luminous, ethereal light, set against a deep indigo and emerald background with soft golden underlighting.
Digital illustration of a woman's silhouette adorned with yellow flowers positioned before a large golden clock face showing Roman numerals, set against a vibrant sunset cityscape with orange and golden hues blending into glowing twilight.
High-contrast black-and-white close-up digital drawing of a female cyborg face with intricate metallic cybernetic enhancements around the left cheek and eye, featuring a dark textured background.
Close-up of a borg man cyborg with gray skin, metal armor, and cables inside a scifi starship, featuring an eyepatch and illuminated green mechanical eye.
Digital artwork of a female character sitting on a park bench in an urban marketplace, wearing white thigh-highs and holding a PlayStation Portable, under daylight.
A towering dark blue mind flayer with glowing white eyes and dripping mouth looms over a cloaked figure standing on rocky ground, illuminated by eerie cinematic lighting against a solid black background.
Minimalist flat vector illustration featuring a black silhouette of a girl looking upward with red and black heart symbols above her head on a yellow background with stylized black vertical lines.
Close-up portrait of a young woman with short black hair wearing a vibrant cobalt blue wide-brimmed hat and matching high-necked coat, featuring bold blue lipstick and eyeliner, against a charcoal gray background.
Vector illustration of a glowing figure with fire for hair hugging a smaller figure with soft pink tones, set against a twilight sky with two crows and a ghost floating nearby.
Highly detailed black and white hyper realistic creature with multiple large horns and tree-like limbs, depicted in a bizarre, otherworldly comic book style at a low angle.
A grand medieval castle atop a hill in the Scottish Highlands, surrounded by morning mist, rolling moorland with blooming purple heather, silhouetted trees, and soft golden sunrise light.
Closeup of a black futuristic helmet with a highly reflective digital display visor showing colorful ASCII art bullseye on a mechanical knight against a desert background.
A futuristic ninja-samurai wearing a polished chrome kabuto helmet and high-tech titanium armor, standing under a full moon with a glowing katana and a black cloak.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

And put it next to Flux.1, Qwen and SDXL on the same prompt.

Get started

2,100+ Models

No GPU

Product screen shoot