Now on the manager for easy installation. Make sure to select Channel:dev in the ComfyUI manager menu or install via git url.
A quickly written custom node that uses code from Forge to support the nf4 flux dev checkpoint and nf4 flux schnell checkpoint.
Requires installing bitsandbytes.
Make sure your ComfyUI is updated.
The node is: CheckpointLoaderNF4, just plug it in your flux workflow instead of the regular one.