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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.

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
Portrait of a nordic female demon with flawless crimson skin, white marble horns curving from her temples, sharp white graphic eyeliner, and avant-garde red couture fashion against a smoky gray background.
Get inspirations

Made on Diffus

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

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.
A detailed sailing ship with orange-brown sails navigating ocean waves in space, with Earth and stars in the background, rendered with low saturation and depth of field.
Dark fantasy scene with large black obelisks in symmetrical alignment and a glowing red eldritch artifact hovering at the center beneath a cosmic sky.
High-detail digital artwork of a faceless god with a starry cosmic face, holding his hand to his face, wearing an intricately designed dark armored robe with a white fur collar, against a star-filled universe background.
A woman with long black hair and pale skin sits in a foggy, mist-covered forest courtyard at night, illuminated by soft candlelight and surrounded by trees and stones.
Close-up of a commander-class mecha head featuring angular graphite-gray armor panels with warm ochre accents, a glowing teal V-shaped mono-eye sensor, and forward-swept yellow antennae.
A large futuristic spaceship with aerodynamic design and intricate details flying above a desert-like alien planet, viewed from a top-down panoramic perspective with soft, diffuse lighting.
Digital graphic design of a woman with a sharp white bob haircut wearing a pastel rainbow geometric patterned jumpsuit, blending into a similarly patterned background, showcasing a sleek futuristic GTA 6 style.
Close-up portrait of a pale-skinned elven princess with silvery hair wearing a sleek black mechanized suit featuring articulated joints and subtle neon accents under Rembrandt lighting.
A serene ethereal female character with long flowing white hair adorned with a delicate floral headpiece, dressed in a light flowing gown holding a glowing golden sword emitting warm light amid golden petals and an ancient arched stone background.
A dark warrior clad in ornate black armor and hood stands wielding a large fiery sword surrounded by a horde of skeletal undead amid blazing flames and smoke.
A picturesque autumn landscape on a Canadian ridgeline with vivid maple trees in deep crimson and orange, morning sunlight streaming through fog, and warm golden underbrush.
A series of colossal circular stone rings covered in lush green moss and vines, forming a tunnel-like ancient ruin deep within a vibrant, overgrown jungle valley with soft, cinematic lighting.
Hyperrealistic detailed portrait of a cyborg girl queen with golden metal armor and red glowing muscles inside, intricate design and delicate lines
A surreal 1980s Japanese horror scene showing a female protagonist with black hair in a bun facing a male antagonist with grey streaked hair in a dim chamber with crimson glowing floor cracks.
A hyperrealistic fantasy portrait of a pale red-haired woman adorned with intricate mechanical metalwork and a golden clockwork phoenix perched near her ear, wearing an elegant silver and red mask, bathed in soft lighting.
A muscular bald man with a thick black beard in a black ceremonial military suit walks down a destroyed urban street in a comic book style digital painting with cyberpunk and futuristic elements.
Expressionism style painting of a creepy rococo clothed opera party with black faces, set in a dark, decrepit birch forest with white tree trunks and glittering black and silver background in summer.
Black and white realistic portrait of a tattooed woman with short hair and a prominent chest tattoo of wings and a geometric design
Full body stylized drawing of a black creepy cat with sharp teeth and a long neck, sitting against a plain gray background in Javier Mariscal style.
Digital illustration of a serene cityscape set along a calm river reflecting tall brown buildings and mountains, featuring a wooden boat with a red roof and people on the water.
Profile view of a cyberpunk comic woman in white attire with a futuristic mechanical spaceship headdress, set against a dark background, featuring a surreal, sci-fi atmosphere.
Dominant giantess with white hair and full arm tattoos wearing a white vest, navy pants, and cape, standing confidently in a rainy city street at night.
A detailed realistic oil painting of a ghul-like monster in intricate armor standing in a dark street at night, accompanied by a young woman holding a lantern.
A red and black ink wash painting depicting an advanced sci-fi cityscape with towering skyscrapers, a calm river with a bridge, and a clear sky.

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