CivArchive
    SECRET SAUCE - Flux2Klein 9B Dist - v1.0
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    This model was finetuned with custom scripts, the goal was to avoid bleeding by focusing only on the core features, without altering the base model sharpness, lighting, style and preserve faces, so you can use a character lora without confusing the weights.

    Initially made for my Blender addon https://pgcrt.github.io/

    Simple workflow with prerendered prompts (CRT Nodes)
    Download the image and drop it into ComfyUI
    https://civarchive.com/images/124361359

    Description

    FAQ

    Comments (23)

    CupRunethOverWithLSDMar 14, 2026· 4 reactions
    CivitAI

    The body shapes looks great. Will def try it!

    WhyNaNWhenNyanMar 14, 2026
    CivitAI

    Last time I've tried finetuning flux klein it was pretty long to train. Do you train with 1024px images or smaller?

    pgc
    Author
    Mar 17, 2026

    Yes it's long, I trained up to 1024px buckets, but images longer side max is 1536px

    bionovafood863Mar 15, 2026· 4 reactions
    CivitAI

    Stop releasing lore already, I'm running out of disk space))

    GlowingGuardianGirlMar 15, 2026· 1 reaction
    CivitAI

    I checked your OpenBlender video. This is insane, amazing work! 🙌

    pgc
    Author
    Mar 15, 2026· 2 reactions

    Thanks! This one? https://www.youtube.com/watch?v=LdsYLxJ3WCc

    Yeah this was the release video of the addon, I'm still improving it, it's a nice tool ,)

    one903045Mar 16, 2026
    CivitAI

    Can you display or share your workflow and the prompt for example images?

    I cannot achieve the effect of your example images using images generated at different resolutions I try. I want to see where the problem lies, whether it's with the process or the prompt.

    pgc
    Author
    Mar 16, 2026

    Download this image and drop it into comfyUI, download / update nodes

    https://civitai.com/images/124361359

    Prompts are prerendered

    brownbagel0Mar 17, 2026· 1 reaction
    CivitAI

    For some reason ComfyUI does not recognize its type and gives me an error: Could not detect model type.

    pgc
    Author
    Mar 17, 2026· 3 reactions

    So you downvoted the model because your download was interrupted? You are blaming the model for that?

    brownbagel0Mar 18, 2026

    Could you please dial it back a bit and keep things respectful?

    Like I said in my comment, I genuinely don’t know the reason behind the error. “For some reason” was meant literally. From my side, there’s no indication that the download was interrupted, so I’m not sure how I would’ve known that. Also curious to know if you can see that from your end and confirm?

    If that is the case, I’m more than happy to redownload the model and reverse the downvote after testing it again.

    brownbagel0Mar 18, 2026· 1 reaction

    Just to follow up, I’ve now redownloaded the model twice (three times in total), so unless I’m impressively unlucky, corruption probably isn’t the issue.

    The “Could not detect model type” error is still persistent, and I also tried it with the provided workflow, same result. So no luck on my end so far.

    I’m sure there might be something obvious I'm missing, so I’m happy to take a look if you have suggestions. But for now, it’s still a no-go on my side.

    mrj622592Mar 22, 2026

    @brownbagel0 I too have the same issue, "RuntimeError: ERROR: Could not detect model type of: C:\ComfyUI_02-27-26\ComfyUI_windows_portable\ComfyUI\models\diffusion_models\: secretSAUCEFlux2klein_v10.safetensors I will attempt a redownload as well and report back, I've had issue like this with Dark Beast models too.

    mrj622592Mar 22, 2026· 1 reaction

    @brownbagel0 I just re-downloaded and tested "the Sauce" got the same error so I downloaded "SNOFS (Sex, Nudes, and Other Fun Stuff) Flux 2 Klein 9b Base & Distilled" distilled version, no issues, works like a charm. I was thinking try another model download...well that isn't it. To bad, "the Sauce" looks interesting, I was looking forward to mess around with it. Ok, brownbagel0 make some room, we are both in the same boat.....hey it could be one of many thing....I'll just move on.

    mrj622592Mar 23, 2026

    @brownbagel0 I think I figured it out, I'm missing or I'm having an issue with "Sage Attention" I think that what its called, I ran pgc's Comfyui setup, updated / installed everything missing, there was plenty, and I ran it, it got stuck on sage attn then bam that error pops up. On my end problem solved. Did I get it going, no, and I don't care too.....I'm not crazy about Comfyui TBH, everybody has their own twist and configs to it....you can have it. I just figure I'd share my findings, maybe....just maybe it'll help out someone else. Later, Mr. J

    brownbagel0Mar 26, 2026

    @mrj622592 That's for the follow up!

    I'm not currently utilizing Sage. Maybe I should. :)

    mrj622592Mar 26, 2026

    @brownbagel0 That's probably the issue, missing Sage Attention.. I'm just going to go back to Z-Image Turbo for a while anyway. Good luck!!!

    TiwazMMar 18, 2026
    CivitAI

    I will just add this for visibility, need it to work in forge, fix it with the python script...
    https://github.com/Comfy-Org/ComfyUI/issues/12622

    model will work in forge and comfy ui after

    Vyxen808Mar 19, 2026· 1 reaction
    CivitAI

    This is the first real fine-tuned version of Klein 9B that I’ve been able to try, and it pleasantly surprised me. It can be used with character LoRAs without changing their features. The only issue is that it tends to deform fingers and small details more than the normal version. Why don’t you upload the FP16 version?

    altoiddealerMar 26, 2026
    CivitAI

    This model is likely very underrated. Amazing job with this!

    milongacarajo244Mar 26, 2026
    CivitAI

    This is All in one? Or do I need to add the Vae and the clip?

    invitMar 31, 2026· 2 reactions
    CivitAI

    Please include a description. These are literally 3 lines of text:

    Sampler

    steps

    cfg

    Your drop image method requires downloading customnode. Without this, the values ​​in the sampler are not visible

    CupRunethOverWithLSDApr 25, 2026· 1 reaction
    CivitAI

    Can you upload a bf16 version? That would be really great!

    Checkpoint
    Flux.2 Klein 9B
    by pgc

    Details

    Downloads
    1,381
    Platform
    CivitAI
    Platform Status
    Available
    Created
    3/14/2026
    Updated
    5/4/2026
    Deleted
    -

    Files

    secretSAUCEFlux2klein_v10.safetensors

    Mirrors

    Available On (1 platform)

    Same model published on other platforms. May have additional downloads or version variants.