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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.

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.
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.
Get inspirations

Made on Diffus

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

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.
A close-up of a futuristic android with a robotic mask made of polished chrome and matte black metals. The mask is adorned with glowing neon teal and magenta circuits, and its eyes emit bright cyan light. Thin streams of neon tears drip down its angular face.
A lone gladiator in battered armor stands at the center of a vast medieval colosseum ruins under a cloudy sky with a glowing full moon, surrounded by autumn leaves and debris.
Portrait of an ethereal red-haired girl wearing a black and gold corseted Victorian dress, lit with Rembrandt-style lighting in an oil painting style.
Count Dracula in a red robe with black hair and beard stands tall looking down at his wife in a long white dress with blonde hair, under a crescent moon night with a castle silhouette and starry sky.
Close-up portrait of a woman with wet jet black hair partially covering her face, bright blue eyes with intricate iris detail, and a sneering expression under cinematic, moody lighting.
Post-apocalyptic ruins of tall, decaying buildings overgrown with forest vegetation under a glowing, foggy atmosphere with floating glowing petals and a white theme.
A glowing deep blue post-apocalypse forest scene featuring towering ruins, floating blue petals, and a foggy, mysterious atmosphere.
Cloud Strife with spiked blonde hair holding a large buster sword on his back in a rain-soaked destroyed city with dark clouds and floating black feathers.
A digital art scene of a mountain valley with snow and ice featuring a large metallic pink sphere floating above, illuminated by soft ethereal light and a solitary red-cloaked figure below.
Close-up portrait of a young woman with freckles, blue eyes, and natural makeup, wearing a black beret and gold hoop earrings in soft natural light.
Ink splash art of a female warrior in red samurai leather armor, shown in silhouette with intricate linework and chiaroscuro lighting, accompanied by Japanese kanji.
Silhouette of two people rowing a boat on a calm lake at sunset with city buildings and an orange sky reflecting on the water
A hyper-realistic chrome skull with a reflective silver and purple surface, mouth wide open revealing a glowing purple orb inside, set against a vantablack background with purple tint.
Hyper-realistic digital chrome skull with reflective metallic surface, molten lava erupting from eye sockets and mouth amid fiery orange glow.
Vector art of Shadow the Hedgehog standing on a rock in a detailed mountain landscape with a large full moon glowing in yellow behind snowy peaks, vibrant flowers in foreground.
A haunting figure with glowing eyes is cocooned in spiked chains within a dark, crimson-lit void surrounded by mist and shadows.
Close-up portrait of a slender fashion model with sharp cheekbones and flawless skin, wearing a sleek high-fashion top, shown with vivid glitch-style color fragments and cinematic lighting on a minimalist soft gray background.
A cyberpunk-style girl wearing a hooded jacket and headphones, with striped thigh-high socks and a choker, standing against a complex futuristic background with chromatic aberration effects.
Profile of a man's head rendered in gray tones with abstract white noise resembling hair, set against a white background.
Close-up of a faceless robot geisha with a smooth porcelain mask, dark hair styled in a bun adorned with gold flower ornaments, wearing an ornate floral-patterned kimono under dramatic volumetric lighting.
A decaying evil clown man wearing a fancy sparkly woman's hat, featuring vibrant colors, bold ink lines, and a watercolor wash on aged paper.
A fearsome chupacabra stands in a moonlit desert outfitted with high-tech survival gear including a hydration pack and sand goggles, depicted with bold ink lines and vibrant colors.
Modern cantilevered building with floor-to-ceiling glass walls illuminated by warm orange light, extending over ocean cliffs at dusk with fog and crashing waves below.
A highly detailed and hyper-realistic river landscape with a wooden cabin, rowboats on clear water, surrounded by lush forest and rocks, under a partly cloudy 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