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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 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
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.
Get inspirations

Made on Diffus

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

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.
A young Asian woman in white and purple traditional hanbok stands in a snowy landscape, holding an ornate sword with a blue and gold hilt, wearing white gloves and a serene expression.
A woman in a red dress stands at the end of a yellow wooden dock stretching into a vast teal sky ocean under moody and cinematic lighting.
Cybernetic Japanese oni wearing a weathered metallic mask with red glowing eyes and horns, standing on a rooftop overlooking a neon-lit cityscape at night.
A male figure dressed as an atmospheric engineer with an intricate black and violet robe, under a starry night sky with twinkling stars and a magical violet glow.
Close-up of a face focusing on an eye with vibrant blue glitter makeup that extends below the eye, complemented by blue lipstick and smooth skin texture
Detailed hyper-realistic line-art illustration of a seated figure with black goat features, blending realism with intricate line patterns in dark blue watercolor and oil painting style.
Vibrantly colored surrealistic painting of a girl's face with unnaturally large glowing eyes, dripping bold paint, and chaotic abstract expressionist elements.
Painting of three girls in a village field at sunset with hay bales, ground fog, and a fallen tree in a painterly style.
A side view of an anime girl with short white hair and glowing orange eyes, dressed in an elaborate red dress adorned with gothic black and red jewelry, set against a vivid red background with floating petals.
A blonde girl with blue eyes wearing intricately carved medieval armor stands outdoors near a castle during sunset with cinematic lighting and film grain effect.
A lone traveler stands in a purple alien desert facing towering black monoliths covered in glowing blue inscriptions beneath a stormy sky with lightning.
A classical 19th-century style oil portrait of a noblewoman wearing a luxurious black and gold ball gown, standing gracefully in a richly decorated ballroom with large windows, velvet drapes, and candlelight.
Dark knights standing beneath towering, ornate golden arches inside an expansive hall featuring Gothic architectural elements and intricate baroque-style details.
A majestic figure adorned in ornate blue and gold crystalline armor with glowing blue eyes, set against a dark background with scattered flames.
A powerful, mythical figure in teal and gold stands prominently with flowing drapery, surrounded by abstract teal and gold waves created with palette knives in a dark evening setting.
Hyper-realistic dark fantasy hybrid creature with an intricate slimy orange and green texture, glowing yellow eyes, and numerous twisted tentacles under dramatic lighting.
Side view of an anthro deer character wearing a green military helmet with a red headband, black eyepatch, smoking a cigarette, and a speech bubble on a black background
A woman with teal hair sitting curled up among vivid yellow flowers and green foliage in a psychedelic line-art style inspired by Adam Hughes, featuring detailed floral patterns and serene atmosphere.
Nero Claudius wearing Greco-Roman silk robe and elaborate jewelry including earrings, necklace, and a leafy head wreath, depicted in an impasto oil painting style with volumetric lighting.
A sleek robotic figure cloaked in a flowing black hood with a glossy reflective head set against a minimalistic, foggy background.
A romanticism-style oil painting of Zhangjiajie towering sandstone pillars enveloped in morning mist, featuring a traditional Chinese temple on a cliff and a figure in robes.
Classical portrait of a young noblewoman standing elegantly in a 19th-century black satin ball gown with lace gloves, gold embroidery, and soft candlelight in a grand ballroom.
Lone traveler in tattered cloak stands in an alien desert of ivory white sand facing towering black obelisks with glowing, intricate inscriptions under a stormy indigo sky.
Tall, slender towers of the Zhangjiajie mountains ringed in mist with sunrays filtering through, showcasing a surreal, fantasy landscape with volumetric lighting and lush greenery.

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