Flux2 Klein 4B · MFlux Q4

This is a Q4 MFlux version of FLUX.2-klein-4B.

MFlux runs the latest state-of-the-art generative image models locally on your Mac in native MLX. MFlux is open source and free.

[!NOTE] Community conversion by MFlux-Community -- not an official release from the original model's authors. The original model's license applies unchanged, see License.

MFlux versions of FLUX.2-klein-4B

Converted on 2026-08-03.

Standard MFlux quantization uses MLX affine quantization (4-bit) across the text encoder, transformer and VAE. The quantization level is stored in the weights, so no --quantize flag is needed.

Usage

Install MFlux

uv tool install --upgrade mflux

Edit an image using FLUX.2-klein-4B Q4:

mflux-generate-flux2 \
  --model mflux-community/flux2-klein-4b-mflux-q4 \
  --base-model flux2-klein-4b \
  --prompt "A puffin standing on a cliff" \
  --width 1024 \
  --height 1024 \
  --seed 42 \
  --output image.png

The weights are downloaded from this repo on first use. To keep a local copy instead:

hf download mflux-community/flux2-klein-4b-mflux-q4 --local-dir ./flux2-klein-4b-mflux-q4

then pass --model ./flux2-klein-4b-mflux-q4.

License

This repo inherits the license of the original model: apache-2.0. See the original model card for the full terms and any usage restrictions. The weights here were modified from the original release only by conversion to MLX and quantization.

Credits

• Original model: black-forest-labs/FLUX.2-klein-4B
• MLX implementation: MFlux by Filip Strand and contributors
• Conversion: MFlux-Community