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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.

posILustrij v1.0
A tall winged figure in a blue dress adorned with swirling colorful abstract patterns stands against a dark background with artistic splashes and tiny curious characters at her feet.
Sheer Tights (pantyhose) v1.0
White-haired girl with blue eyes sitting on a subway bench with an abstract background filled with many blue eyes.
A glamorous woman in a deep red sequin dress performing with a vintage microphone on a stage with a grand piano and dramatic lighting in a retro nightclub setting.
Aka6 [Illustrious] Style LyCORIS v1.0
A cat girl character with black hair, green eyes, round rimless glasses, cat ears, and tail, wearing an off-shoulder green sweater, kneeling barefoot.
Somman v1.0
Link from the legend of Zelda BOTW [FLUX DEV] v1.0
A stylized white-haired girl with green eyes wearing a dark green overcoat stands in a snowy village at night with falling snow and illuminated lampposts.
Close-up portrait of a girl with long black hime-cut hair and red eyes drinking blood from a blood bag using a straw, dressed in a white coat and black shirt with a red necktie, set against a dimly lit dark background with soft shadows.
Quaintly Chaotic Comtesse FINAL
AyamiKojima Style v1.0
Anime Art-Style Anime_Retro
A detailed landscape painting forming a face silhouette with a snow-capped mountain ridge, an alpine lake reflecting dawn light on the left, and a shadowed pine forest with a chapel clearing on the right.
Cyberpunk stylized portrait of a bald woman with tribal patterns and big eyes, lit by pink and blue light with glasses and electrical wires attached.
MeMaXL Flat Anime Style - Noob/Illustrious/Pony/XL v4.0 B [Zootlustrious-v2]
Get inspirations

Made on Diffus

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

Close-up portrait of a woman with dark chocolate skin, white hair, grey eyes, white lipstick and nails, wet skin, set against a black background.
Close-up portrait of a redhead woman with blue eyes and dramatic lighting, featuring a flamboyant hairstyle and sun tanned skin against a blurred dark background.
A detailed oil painting of a sinister creature wearing a cracked, blue and white mask with black liquid oozing through fissures, dressed in a sporty tracksuit against an orange abstract background.
Digital artwork showing a split image of an oriental female angel with platinum hair and white gown on one side, and as a fallen angel with black hair and black bodysuit on the other.
A detailed gryphon creature perched on a moss-covered forest branch, wings spread wide, with sharp talons and glowing orange eyes in a misty woodland.
Colossal sci-fi white towers standing tall on a pristine snowy field under a dark blue evening sky, with soft blue lights and light falling snow.
A woman in an elegant orange dress stands on rocky terrain near a large tree, overlooking a deep canyon with a waterfall and lush greenery under a bright sky.
A photo realistic painting of a gigantic prehistoric skeleton lying in a desert at sunset with a woman standing between its ribs, casting long shadows under dramatic, warm light.
Detailed depiction of a golden Aries astrological symbol featuring an ornate Victorian-style spiritual figure with elaborate armor and flowing elements on a black background.
A dark post-apocalyptic wasteland under a grey sky featuring a large, brutalist tower with a skull embedded, surrounded by rocky desolation.
A neon-haired anime girl with pastel pink and blue hair, wearing a shiny yellow and blue retro-futuristic jacket, posed against a dark sky blue gradient background.
A cyberpunk woman with long white hair wearing a black off-shoulder corset dress, white stockings, and black high heels standing with flowing skirt against a blue gradient background.
A girl with long light blue braided hair wearing a pastel pink frilly dress with lace and ribbon accents, thigh-high stockings, and platform heels stands against a vivid pink cloud backdrop.
Detailed digital portrait of a fox character wearing a sleek helmet with glowing red eyes, adorned in dark clothing and layered jewelry, set against a vibrant red background.
Anime girl Ninomae Ina'nis with an elongated body, blunt bangs, a halo, purple cat paws, and a dark abstract background
Stylized image of a girl with a thick braid, wearing a deep blue cropped bomber jacket over a burnt orange dress, knee-high boots, and fingerless gloves, illuminated by warm sunlight.
Silhouette of a person standing with a bicycle under a huge luminous eclipse in a dark, monochromatic night sky with clouds.
A photorealistic image of a jaguar lying on a large tree branch in the African savannah during a golden sunset with a big round sun in the background.
A woman in a flowing white dress dances barefoot on a giant piano keyboard surrounded by swirling floating sheet music under a bright blue sky.
Minimalist pencil caricature on cream-toned sketchbook paper showing a forlorn stick figure with slumped posture and teardrop, standing under a speech bubble with handwritten text about AI tool outages.
Female anime retro style warrior holding a katana sword, wearing sheer tights and glossy black shorts under pink and blue surreal iridescent lighting.
A slender cyborg girl with a robotic arm stands in a dynamic pose wearing fluffy slippers, a loose pajama shirt, and mini shorts against a warm, abstract sleepy background.
A tall slim girl with short black fluffy hair, red eyes, black bunny ears and tail, wearing a white long tunic with a red cross, standing angrily on a glowing red floor in a dark setting.
Dark fantasy scene of a glowing-eyed girl with horns and striped pantyhose standing confidently before a giant monstrous creature adorned with skulls and glowing eyes, surrounded by lightning and smaller skull-faced creatures.
Heroic figure faces a giant glowing-eyed dragon boss amid dark moody clouds with a distant castle in the background.
A majestic mountain peak at night with a glowing celestial gate emitting pink light, under vibrant aurora borealis and starry sky, with a lone figure standing before it.
A female cyborg sits cross-legged on a New York City pier at twilight, her digital mask glowing red with a LOW CHARGE warning, surrounded by a dark, mysterious atmosphere.
A ghostly glowing anglerfish emerging from pitch-black depths with sharp, needle-like teeth illuminated in eerie bioluminescent light.
Digital artwork featuring a close-up profile of a woman with a bold mohawk made of vibrant neon colors, metallic skin, and an abstract, dynamic background split in bright color blocks.
Dark, dystopian armored figure resembling the Punisher with a grotesque skull helmet and a cracked skull emblem on chest, standing in a bleak post-apocalyptic environment.
Portrait of a woman with blue-toned skin wearing a large black hat and a metallic necklace, dressed in dark elegant fashion with red lipstick.
A half-human, half-machine hybrid with smoke swirling around its head, gazing into its reflection on a weathered, rusty surface, with ancient ruins in the background.
A towering futuristic building composed of numerous orange and gray cubes floating above the ground in a mountain canyon, with a small person standing beneath it under a night sky.
A detailed anime-style wooden Iron Age roundhouse with a moss-covered roof set beside a reflective water body in a dense pine forest during daylight.
A woman with dark wavy hair wearing a fitted long-sleeved red dress stands centered against a bright red background with scattered white papers on the floor, photographed in a minimalist, high-contrast style.
Adorable grey and white fluffy cat lying on its back in a pink pet bed with big eyes and raised paws showing pink bean toes.
Hyper-realistic portrait of a young woman in a light summer dress leaning against a textured wall, softly lit by natural sunlight in an outdoor setting.
Photorealistic portrait of a stunning sci-fi space policewoman with long platinum hair wearing a black police cap and a skin-tight unzipped bodysuit showing cleavage against a sepia gradient background.
A detailed oil painting of a frail, ecstatic teen Duchess in a tightly corseted cream dress with off-shoulder lace sleeves, platinum blond hair in a bun, head tilted back with closed eyes against a dark background with golden leaves.
A white-skinned albino teen cyborg girl holding a white cat, walking down a snowy, deserted street in a post-apocalyptic setting, wearing a black futuristic dress with mechanical details and blue eyes.

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