"flux1-dev-bnb-nf4" is a new Flux model that is nearly 4 times faster than the Flux Dev version and 3 times faster than the Flux Schnell version.

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"bitsandbytes_NF4" custom node download:

https://github.com/comfyanonymous/ComfyUI_bitsandbytes_NF4

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"flux1-dev-bnb-nf4" model download:

https://huggingface.co/lllyasviel/flux1-dev-bnb-nf4/blob/main/flux1-dev-bnb-nf4.safetensors

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Download Flux nf4 workflow.

Click on below link for video tutorials:

https://www.youtube.com/@CgTopTips/videos