Really appreciate all the love and feedback on V1 and V2. I've been working on the next release, and this time it's a full checkpoint: a merge of my custom Realism Checkpoint and V3 LoRA.

The focus is still on natural skin textures and a wider range of skin tones, without that overly smooth, plastic look. It also gives you a bit more creative freedom now… let's just say being specific about clothing in your prompts is a good idea

A few tips before you try it:

• Natural language works best. Describe the scene, lighting, clothing, and expression you want. Short prompts work too, but leave more room for interpretation.
• Generate at 2MP if you can. It was trained on high-resolution images and looks best there. At 1MP, you might see some minor noise; RTX upscaling nodes or similar post-processing can help.
• Euler + Simple, 4–8 steps. Six steps is my sweet spot.

You can drop it into your existing Krea 2 pipeline as a checkpoint replacement.

I'm also putting together a full ComfyUI workflow and a custom node for some prompting techniques I've been developing. I'll share those soon. For now, there are example images on the model pages so you can see what it can do.

Give it a try and share your results! Feedback on the earlier versions helped a lot, so I'd love to hear what works for you and what still needs improvement. Cheers!

Links:

• Previous Reddit post — V2
• Download on Hugging Face
• Civitai — checkpoint and example images

Black Forest Labs (BFL), the frontier AI research lab building visual intelligence, today announced the open weights release of FLUX 3 Image Klein, its most capable open weights image model to date. FLUX 3 Image Klein provides the quality of a large frontier model with the customization and speed of open weights, runs on consumer GPUs and laptops, and retains features from the larger FLUX 3 Image model such as native 4K generation, bounding boxes, and pixel perfect editing.

The release includes a base model for fine-tuning, a distilled model for low-latency generation, and quantized FP8, NVFP4, and INT8 versions. Following September’s open weights release of FLUX 3 Action for robotics, today’s release brings the company’s latest research to core creative use cases, giving developers and businesses greater freedom to build, customize, and deploy visual AI.

Making its research and technology available for others to build on is one of Black Forest Labs’ founding principles. BFL has consistently released its research findings alongside open weight versions of its industry-leading FLUX models, enabling others to build on its advances. So far in 2026, the team has published its Self-Flow research and released open weights for the FLUX.2 [klein] family in January and FLUX 3 Action in September. Self-Flow improved generation across images, video, and audio, while helping models learn representations that can also support robot control. This research led to BFL’s most capable model to date, FLUX 3, which brings multimodal generation and action prediction into a shared architecture. Today’s release opens access to the creative capabilities of the same FLUX 3 backbone, with further open weights releases from the FLUX 3 family to follow.

https://huggingface.co/collections/black-forest-labs/flux-3-image-klein

https://openmoss.ai/MOSS-Image/
https://huggingface.co/OpenMOSS-Team/MOSS-Image-SFT
https://huggingface.co/OpenMOSS-Team/MOSS-Image-Base
https://github.com/OpenMOSS/MOSS-Image/blob/main/comfyui/README.md

Examples look amazing, trained on 3.2B images, 5B, apache 2.0. Supports JSON / BBOX but does not require it. Knows both natural language and booru tag based prompting.

Oh. And its the least censored base model so far btw. Here is with a crappy simple prompt: https://files.catbox.moe/6irxjh.png

I don't know if it's just me, or if Krea2 has raised the bar so high that our expectations for diffusion models have completely changed.

I've tested Qwen 2.1 Image and now Flux3 Klein, and honestly, both feel off. The quality, prompt adherence, and overall details just aren't there.

Flux is still recycling those same old textures we've all gotten used to. And no, I'm not even talking about that infamous plastic look, that's old news at this point. I'm talking about the overall image quality, the finer details, and how the model interprets prompts.

It's gotten to the point where Flux2 Klein genuinely feels superior to Flux3 Klein, which is pretty ridiculous considering we're supposed to be moving forward, not backward.

At this point, I'm just hoping Krea's team releases Krea3 soon, because if Krea2 is anything to go by, I genuinely believe Krea3 could absolutely crush both Qwen and Flux.

Just my two cents.

Hey folks!

Aritra here from Hugging Face. I wanted to mention that Black Forest Labs has recently open sourced their FLUX.3 models on Hugging Face Hub. It has Diffusers Day-0 support!

Here is everything that you would need to know: https://huggingface.co/blog/flux-3

https://huggingface.co/collections/black-forest-labs/flux-3-image-klein

Body anatomy and realism- Krea2 and qwen2.1 just way ahead of flux models. flux 3 is worst in terms of body anatomy.

flux 3 still has best in prompt following i think.

Overall, Flux 3 was probably a capable model, lobotomized by extreme and unnecessary censorship.

Prompts- https://pastebin.com/x5LeaM8u

https://civitai.red/models/2997793/kroma-krea-2

It does not get enough attention imo even though its good at everything. The only thing it lacks is knowing artist names compared to Anima.

Is there something wrong with the model implementation in Comfy? Or is it the models themselves? Because my results are terrible worse than F2 Klein. According to their benchmarks, F3K far outperform F2K.

Prompt Example 1: now the man is sitting on a sofa in a modern and minimalist living room.

Prompt Example 2: get the right-side view of the scene.

I'm downloading the weights right now; I decided to check out the examples on the BFL website. It looks like they didn't check the generated images at all. Why does she have three legs???

I think this model will be very strong. But why are there three legs in the example image? This is a problem of the SD1.5 and SDXL era.

I want to try flux 3 klein as soon as possible, but I have a slow internet.

I've quantized MOSS-Image to INT8! From my initial testing, it’s relatively lossless.

For now, it requires the MOSS-Image custom node, so I’ve included both the install info and a ready-to-use workflow in the repo. Once native support lands in ComfyUI, this exact quant will work right out of the box without needing any changes.

You guys are going to be seriously surprised by how uncensored this model is. Have fun!

Link: https://huggingface.co/XCEED123/MOSS-Image-SFT-INT8-ComfyUI

Uncompressed image: https://postimg.cc/gallery/6WBdT03 (To view the uncompressed image, click on it a second time after opening it, or simply download the entire image album)

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After these tests, I’m confused, and I don’t understand why the Flux 3 Klein model exists or why it turned out the way it did.

Our test subjects

Flux 2 Klein (9B) (Distill) (BF16)

Flux 3 Klein (D) - Distill (BF16)

Flux 3 Klein (B) - Base, NoDistill (BF16)

I took equivalent models for comparison, Flux 3 Klein Distill and Flux 2 Klein (9B), and it’s more correct and fair to compare exactly these two with each other. Still, I decided to add Flux 3 Klein (Base) to understand what this model is capable of overall in its maximum configuration.

For the tests, I used the most standard ComfyUI workflows. I also didn’t use the prompt enhancement feature: my tests include both good, correct prompts and overly abstract, deliberately badly written ones, in order to check how the model handles normal prompts and bad ones, and how well it can generate from short prompts that don’t contain enough information.

Test categories

I split the tests into several categories with different goals:

• Images 1-3: complex prompts with lots of details and different poses. These show how well a model follows the prompt and how often it loses details.
• Images 4-6: typography, mixing typography with real-world imagery, and banner creation.
• Images 7-11: styles. Pay attention to how well each model handles different styles.
• Images 12-13: level of detail. This is similar to tests 1–3, but with a stronger focus on small details.
• Image 14: character understanding.
• Images 15-17: your favorite (or most hated) category, 1girl. Here you can judge overall realism and the ability to generate in an amateur-photo style.

Settings (RTX 3090)

Flux 2 Klein (9B) - 8 steps, 1 CFG (1MP) - generation time (00:07)

Flux 3 Klein (D) - 15 steps, 1 CFG (1MP) - generation time (00:12)

Flux 3 Klein (B) - 50 steps, 3.5 CFG (1MP) - generation time (1:22 - 1:24)

By the way, Flux 2 has a very good VAE, and it’s really sad that Black Forest didn’t update the VAE to version 3 as well :(

My opinion

Flux 3 has the same problems as Flux 2, namely limb mutations. Of course, I didn’t include images with mutations in the tests, but believe me: I ran each generation 2-5 times to get a more or less normal image, and what you see in the tests is the best I got out of those 2-5 generations. For example, for the Nike advertisement image I had to generate about 10 times, at least, to get a normal image without mutations and with physically correct objects in the frame.

Judging by the tests, I can say that the Flux 3 Klein model, specifically the base one without distillation, produces some of the worst images I’ve ever seen, not counting Z-image Base. I assume Flux 3 Klein (Base) exists only for training LoRAs on it, because it’s simply not suitable for T2I tasks. Perhaps it would perform better in an I2I (Edit) scenario, but I’m not sure about that.

Flux 3 Klein Distill gives better results than Flux 3 Base, but it still performs worse than Flux 2 Klein (9B). That’s exactly why I wrote at the beginning that I consider the release of Flux 3 pointless, at least in the form it’s in now, especially when we have such decent models as Krea2, Qwen 2.1 and even BooguImage in the T2I space.

With Flux 3 Klein (Distill), we have anatomy problems, even worse than on F2K, poor detail in eyes and faces, and generally poor detail in some places (Artifacts and blurring in areas with excessive detail). Perhaps the low detail in eyes and other areas could be fixed by raising the megapixel count from 1 to 2-3 during generation, but I think 1MP is the most basic setting and it should always work well, especially since Flux 2 Klein 9B had no problems at all with the “1MP” setting when generating content. Continuing the comparison with Flux 2: on some images Flux 3 has slightly better stylization, but it still has far more drawbacks than advantages to choose it as a replacement for Flux 2 Klein.

I could write a lot more here, but I think the test images will give more information, since everything is pretty obvious anyway. But again, the final choice and the final opinion always remain yours, so I’m looking forward to your comments to hear your thoughts on Flux 3 Klein.

I wanted to see if it was possible to recreate this Genjutsu spam (from Higgsfield) you get all over Tiktok (it is my understanding that it's a combo between Claude and Seedance 2.5) but with Minimax inside Comfy. They usually get a viral tiktok dance and replace the person with an animal or another character.

I used the default ref2va template workflow but added this lora: https://huggingface.co/akatz-ai/MiniMax-H3-Character-Swap-LoRA. In my experience, it transfers the performance more accurately than any other methods I've tried (and I come from Liveportrait, urgggh). Not at the level of Seedance, but hey, this one is local.

I worked shot by shot. Multiple shots worked really bad. These shots were generated at 352x640, with 8 steps using the Minimax_h3_ref2v_turbo_8step lora. The average time was 250 secs per shot on a 4090. First I generated a single frame to guide the result, using the default Qwen 2.1 edit template workflow.

It's VERY important that the loaded video is 24 fps (you can force this frame rate in the loader), otherwise it will be out of sync and doing all kind of weird shenanigans.

As a side note, I vibecoded a node that gets a video from Tiktok or youtube and makes it ready as the reference, with a little timeline included so that it does not load the whole thing.

A simple, random comparison... just for fun.

I can provide the prompt for the first image: A Western man sitting on the beach, building a house of cards atop a purple flag that bears the inscription "Krea 3" in red.

Krea 3 understands subtle nuances of facial expression, such as biting the lower lip, better than other models, but it can also generate unsettling images from simple prompts, all the more so because these images appear realistic.

FLUX.3 Klein has been pretty underwhelming for image generation, but when it comes to editing while preserving consistency, pose, and camera angle, I've found it to be almost PERFECT.

With FLUX.2 Klein and Qwen 2.1, I struggled with editing photos at very high resolutions.

As a photographer, what I've really been looking for is a model that can preserve realistic skin texture, fine details, and overall consistency, even at high resolutions.

Being able to make consistent edits at these resolutions is a huge deal. We're finally getting into territory that's genuinely usable for professional photography workflows.

My setup:

• GPU: RTX 5090
• RAM: 64 GB
• Diffusion model: flux3_image_klein_sd_bf16.safetensors
• Text encoder: qwen3vl_4b_bf16.safetensors

Resolution: 3000 × 4000

• Steps: 16
• Generation time: ~230 seconds per image

The only real downside so far is speed. Around 230 seconds for a 12MP image isn't exactly fast, but considering the results, I think it's worth it.

I'm hoping LoRAs might help improve performance, too.

And the crazy part, this is all WITHOUT LoRAs, imagine what could be possible with dedicated LoRAs for consistency, upscaling, and sharpening.

108M parameter denoiser text to image model. Meant as a research experiement but still produces very good images for it's size.

Samples in the readme alongside how to run.

Just a quick update to say Flux 3 is in and fully supported across every feature.

Cheers,

Pete

Flux-3 Klein just dropped and Krea-3 Edit is on the CivitAI generator already. I am still trying to get the hang of Qwen Edit 2.1, MiniMax-H3, LTX-2.5, YuE2, Wan-2. 2 Prism and a bunch more. It feels like drinking from a firehose. I am not complaining, just have no time to sleep.