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About FLUX.2 [klein]

FLUX.2 [Klein] is the fastest model in the Flux family, unifying text-to-image and image editing in one compact architecture. It’s designed for interactive workflows, immediate previews, and latency-critical applications, with distilled variants delivering end-to-end inference around one second while keeping strong quality for single- and multi-reference editing. Model highlights:
  • Two 4B types: Base (undistilled) for maximum flexibility and fine-tuning; Distilled (4-step) for speed-first deployments
  • Performance: distilled ~1.2s (5090) · 8.4GB VRAM; base ~17s (5090) · 9.2GB VRAM
  • Editing support: style transforms, semantic edits, object replacement/removal, multi-reference composition, iterative edits
Make sure your ComfyUI is updated.Workflows in this guide can be found in the Workflow Templates. If you can’t find them in the template, your ComfyUI may be outdated.If nodes are missing when loading a workflow, possible reasons:
  1. You are not using the latest ComfyUI version (Nightly version)
  2. Some nodes failed to import at startup

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Flux.2 Klein 4B Workflows

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Flux.2 [Klein] 4B: Text to Image

Flux.2 Klein 4B text-to-image workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

4B Text-to-Image Workflow

Download the text-to-image workflow for Flux.2 Klein 4B.
Example output Flux.2 Klein 4B text-to-image example

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Flux.2 [Klein] 4B: Image Edit

Flux.2 Klein 4B image edit base workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

4B Image Edit Base

Download the image editing workflow using the 4B base model.
Input materials Upload these files to the matching LoadImage nodes:

robed_women.png

LoadImage node 76 · robed_women.png

pink_tone_chair.png

LoadImage node 81 · pink_tone_chair.png
robed_women.pngpink_tone_chair.png
Example output Flux.2 Klein 4B image edit base example

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Flux.2 [Klein] 4B Distilled: Image Edit

Flux.2 Klein 4B image edit distilled workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

4B Image Edit Distilled

Download the fast distilled 4B image editing workflow.
Input materials Upload these files to the matching LoadImage nodes:

handbag_white.png

LoadImage node 76 · handbag_white.png

comfy_logo_blue.png

LoadImage node 81 · comfy_logo_blue.png
handbag_white.pngcomfy_logo_blue.png
Example output Flux.2 Klein 4B image edit distilled example

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Flux.2 Klein 4B Model Downloads

qwen_3_4b.safetensors

Text encoder for 4B models.

flux-2-klein-base-4b-fp8.safetensors

Diffusion model (4B base).

flux-2-klein-4b-fp8.safetensors

Diffusion model (4B distilled).

flux2-vae.safetensors

VAE for 4B models.
4B Model Storage Location

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Flux.2 Klein 9B Workflows

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Flux.2 [Klein] 9B: Text to Image

Flux.2 Klein 9B text-to-image workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

9B Text-to-Image Workflow

Download the text-to-image workflow for Flux.2 Klein 9B.
Example output Flux.2 Klein 9B text-to-image example

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Flux.2 [Klein] 9B: Image Edit

Flux.2 Klein 9B image edit base workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

9B Image Edit Base

Download the image editing workflow using the 9B base model.
Input materials Upload these files to the matching LoadImage nodes:

car_interior_white.jpeg

LoadImage node 76 · car_interior_white.jpeg

comfy_logo_blue.png

LoadImage node 81 · comfy_logo_blue.png
car_interior_white.jpegcomfy_logo_blue.png
Example output Flux.2 Klein 9B image edit base example

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Flux.2 [Klein] 9B Distilled: Image Edit

Flux.2 Klein 9B image edit distilled workflow preview

Run on Comfy Cloud

Run this workflow on Comfy Cloud

9B Image Edit Distilled

Download the fast distilled 9B image editing workflow.
Input materials Upload these files to the matching LoadImage nodes:

bold_outfit_woman.jpeg

LoadImage node 76 · bold_outfit_woman.jpeg

handbag_white.png

LoadImage node 121 · handbag_white.png
bold_outfit_woman.jpeghandbag_white.png
Example output Flux.2 Klein 9B image edit distilled example

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Flux.2 Klein 9B Model Downloads

For diffusion models, please visit BFL’s repo, accept the agreement, and then download the models.

flux-2-klein-base-9b-fp8.safetensors

Diffusion model (9B base).

flux-2-klein-9b-fp8.safetensors

Diffusion model (9B distilled).

qwen_3_8b_fp8mixed.safetensors

Text encoder for 9B models.

flux2-vae.safetensors

VAE for 9B models.
9B Model Storage Location