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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 tribal witch with long flowing hair and minimal tribal clothing walks up a sandy mountain path in a vast desert surrounded by sandstone cliffs, approaching an ancient stone arch bridge under a twilight sky.
Ionsyx V2.0 - Base
A barefoot stranger cloaked in living moss and leaves holding a lit lantern walks from a bioluminescent forest toward a futuristic glass highway with hovercars and a glowing city skyline under an overcast sky.
Glow Intensity Slider v1.0
Dark Fantasy Digital Art Style v1.1 Flux Dev
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
Get inspirations

Made on Diffus

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

Grayscale artistic portrait of a mysterious figure with flowing smoky hair and glowing ethereal eyes, set against a white background
A futuristic white spacecraft with metallic accents surrounded by smaller aerodynamic ships in a vibrant blue and purple cosmic space scene with a planet, moon, and silhouetted figure with a small animal.
A towering white and red futuristic mech with intricate mechanical details, standing on a snowy landscape surrounded by smaller figures in red spacesuits under a blue sky with clouds and distant sci-fi structures.
Portrait of an elegant woman with sleek bob hairstyle wearing a sheer patterned lace dress against a bold black and orange background.
A silhouetted boy holding a bubble wand against a vibrant, surreal dusk sky releasing colorful glitching neon mist with a crescent moon and a distorted airplane in the background.
A figure wearing a dark metallic cybernetic oni mask with glowing red eyes and horns stands in a neon-lit city street at night, surrounded by blurred pedestrians and vibrant signs.
Darkly lit image of a soul knight in detailed, worn armor seated with hands clasped, set in a glowing fantasy tavern background with intricate lighting.
Profile view of a sleek cybernetic character with glossy black surfaces and vibrant gold flowing hair intertwined with glowing strands, featuring glowing pink eye accents and intricate mechanical details.
A sleepy girl wearing an adult romper lies on a blue couch near large windows with flowing curtains and potted plants, bathed in warm volumetric lighting.
A weathered treehouse built atop a massive gnarled tree trunk with broadcast tower elements, surrounded by mountainous landscape and hanging banners under soft Rembrandt lighting.
A mystic figure wearing a ragged, tattered brown cloak and bandages wrapped around their head stands solemnly surrounded by fluttering butterflies in a dark and moody atmosphere.
A solitary person with a shaved head dressed in a long black coat and lace top stands on a dimly lit street holding a large dog on a leash, illuminated by warm streetlights.
Portrait of a strong fantasy dwarf warrior with a long, braided beard and thick detailed armor, wearing an intricately designed metal crown with dramatic cinematic lighting.
Close-up of a dark, battle-worn EVA-class combat helmet with a high-gloss visor etched with a skull motif, reflecting a pile of human skulls under amber firelight.
A hyper realistic, otherworldly tree-like creature with intricate roots and branches towering over a lone figure in a red coat on a rocky path under a stormy sky.
A breathtaking otherworldly landscape panorama featuring towering lush green mountains towering above a flowing rocky river under dramatic cloud-filled sky with soft atmospheric haze.
A man performs an extreme mountain bike jump off the edge of a skyscraper roof in a megapolis under cloudy skies, showing dynamic motion and danger.
Fashion photography portrait of a woman with long flowing light brown hair and piercing blue eyes, wearing a black pleated skirt and sweater, standing in a field with blurred flowers.
A skull with polished chrome-like texture holding a glowing lime green ball in its mouth, set against a vivid lime green background with glowing eyes and surreal metallic reflections.
A futuristic female astronaut in a dark, detailed space suit sits on the icy regolith of Callisto, viewed through a satellite targeting interface displaying telemetry data.
Black and white photograph of a woman wearing a black coat standing on a winding coastal road with stormy sea waves and misty hills in the background, her hair blowing strongly in the wind, with a blurred man's silhouette in the foreground.
Solitary small house with black roof in a foggy mountainous landscape surrounded by rocks and grass under an overcast sky.
A slender woman with a bald head in a long black dress stands in a curved brick tunnel illuminated by dramatic lighting with red and blue textured bricks.
A cloaked black souls figure with glowing red eyes faces a group of happy poro creatures inside a wooden cabin with a swirling congo-pink vortex above.
Highly detailed oil painting of a Knight Templar in polished plate armor sitting on a Gothic throne, holding a white Pomeranian dog, with a dark, moody background.
Portrait of a saint crusader woman in intricate robotic armor holding a long spear and round shield, standing in white marble futuristic ruins under bright light.
A meditative figure seated on a rocky hill surrounded by glowing cosmic light, sacred geometry, and layered atmospheric dimensions in a surreal, mythic cinematic style.
A regal female figure with long blonde hair, wearing an ornate red gown with gold embroidery and an elaborate crown, holding a glowing white dove emitting warm light, set against a dark, mystical background.
A dark knight clad in jagged blackened armor stands confidently holding a massive fiery sword with glowing amber eyes piercing through a shadowy mask, wearing a tattered cape, amidst ember sparks.
A female android with a porcelain-like face and elaborate dark updo, wearing a teal and gold embroidered dress with intricate wires and electric lights on her skin, standing against a gold patterned background.
Bird's eye view of a postapocalyptic congested cityscape featuring tall, worn buildings, crowded streets, and a gloomy, Mad Max inspired atmosphere with tilt-shift effect.
A dark fantasy digital illustration of a female warrior wearing a detailed purple and black kimono armor, holding a glowing purple sword, standing on a rock under a glowing circular light in a stormy sky.
A highly detailed and adorable animated snail in Disney Pixar style, with big blue eyes, fluffy fur, a glossy brown spiral shell, and water droplets on its body.
Closeup of a cyberpunk gynoid female face with segmented mechanical panels, intricate wiring, and glowing red eyes.
Rick and Morty depicted in Russian Palekh folk art style with neon green and gold cosmic tree, surrounded by dark twisted branches and glowing alchemical energy.
Expressionism style owl with vibrant deep blue, fiery orange, and yellow feathers, large bulging eyes, jagged outlines, and a swirling colorful background.
A confident female elf warrior with long silver hair and pointed ears stands in a warmly lit medieval tavern, wearing detailed leather armor with metallic accents, accompanied by a large, light-coated hyena with a harness.
Realistic photo in cubism style depicting an illuminated queen and king standing near a Mediterranean rural church in a serene yet ominous atmosphere.
A sorceress in white robes and a soldier holding a staff stand on a path leading to a large Gothic cathedral in a dark desert under a black night sky with palm trees on either side.
A large floating rock held by three ancient chains, topped with a majestic oak tree. A glowing magical crystal embedded in the rock emits a waterfall flowing from an elliptical portal, under a bright blue sky with a comet streaking by.

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