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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.

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.
Humans LyCORIS v1.0
Get inspirations

Made on Diffus

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

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.
A dark gothic demonic warrior stands powerfully amidst ancient ruins under a full moon, holding a large battle axe with glowing green core and horned helmet.
Detailed cyborg portrait featuring gold swirling accents and crystal-like elements on a realistic female face set against a black background.
Full body depiction of Sheelba of the Eyeless Face, a pale warrior in white and yellow garments standing on rocky terrain in an elvish landscape under a yellow sky in Moebius style with volumetric lighting and intense colors.
A dark knight clad in spiked armor and a horned helmet stands ominously in front of a large, glowing red moon, holding a gothic sword with a misty and eerie background.
A hyperrealistic digital portrait of a striking young platinum blonde woman with slicked-back hair, piercing blue eyes, dramatic black eyeliner, and a black top against a dark gradient background.
A digital painting of an orange hair girl with red eyes, sitting crouched in an urban setting with a white brick wall and framed photos behind her, wearing an orange ribbed sweater, green pants, and brown boots, bathed in warm sunlight.
Flat vector illustration of a girl laughing and sitting cross-legged on a cushion in a bedroom, holding a pink phone, pointing, with two cats in front of her, potted plants, and a stack of books nearby.
A serene lake at dawn with reflective water mirroring a soft pastel sky in pale blues, pinks, and lavender. Mist partially obscures a pine tree-lined shore under diffused early morning light.
Close-up portrait of a young woman with red hair, glowing skin, pearl earrings, and vintage-style clothing illuminated by Rembrandt lighting.
Full body of a male warrior with an illuminated alabaster face and flowing cosmic nebula-like cloak, standing on rocky terrain against a starry fantastical sky.
Photorealistic mechanical knight wearing metallic armor and a tattered cape, standing in a desert with a giant sword, amid sand and fog haze.
Portrait of a princess woman with long pink hair covering her eyes, wearing a high glossy metallic maid-inspired dress and a silver tiara, standing before a dark gothic mansion background.
A slender woman in a black asymmetrical dress stands in a doorway illuminated by striking red light, facing a dimly lit teal room with a modern white chair and a small table with lamp, and a pile of clothes on the floor.
A hyper detailed, futuristic structure resembling a massive spherical skull on a rocky distant moon, featuring acidwash textures and intricate mechanical elements, under a sunset sky with smaller moons in the distance.
A dark warrior mage clad in intricate black armor with glowing runes summoning two crackling, blue arcane magic orbs in a misty fantasy battlefield.
Silhouette of an observer standing on a glowing red surface facing a glowing fiery spiral mandala surrounded by dark clouds and mist at the end of the universe.
Black and white image of a man in a classic black tuxedo kissing a woman dressed in a nun costume with a white headscarf and black corset, seated on a black cube in an arched setting.
Old sealed letter on antique paper surrounded by handwritten script, accompanied by a black ink bottle and elegant fountain pen.
A confident woman with red hair sits in a modern swivel chair wearing a wide black brim hat, black leather top with puffy sleeves, bell-bottom black pants, and high platform heels with red soles, posed dominantly with praying hands under a spotlight in a minimalist studio setting.
Stylized fashion illustration of a Danish woman with a ginger bob haircut wearing a black blazer, turtleneck, flared trousers, and high platform black patent leather shoes sitting on a yellow block against a monochromatic yellow backdrop.
Monochrome photo of a shiny metallic obelisk with a high reflective finish standing tall in the middle of a grassy morning meadow under a foggy sky.
Jinx from Arcane with pale blue emo hairstyle stands in a dark urban alley illuminated by a flickering pink and blue neon sign, surrounded by graffiti walls and trash bins.
A lone traveler in a hooded cloak stands on an alien desert of ivory white sand, facing towering black obelisks with glowing inscriptions under a stormy sky illuminated by lightning and auroras.
Female warrior with flowing fiery hair and glowing orange eyes, clad in detailed ornate dark armor, standing in a moody forest with embers floating around.

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