ModelSamplingFlux - ComfyUI Built-in Node Documentation

Complete documentation for the ModelSamplingFlux node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The ModelSamplingFlux node applies Flux model sampling to a given model by calculating a shift parameter based on image dimensions. It creates a specialized sampling configuration that adjusts the model’s behavior according to the specified width, height, and shift parameters, then returns the modified model with the new sampling settings applied.

Inputs

Parameter	Description	Data Type	Required	Range
model	The model to apply Flux sampling to	MODEL	Yes	-
max_shift	Maximum shift value for sampling calculation (default: 1.15)	FLOAT	Yes	0.0 - 100.0
base_shift	Base shift value for sampling calculation (default: 0.5)	FLOAT	Yes	0.0 - 100.0
width	Width of the target image in pixels (default: 1024)	INT	Yes	16 - MAX_RESOLUTION
height	Height of the target image in pixels (default: 1024)	INT	Yes	16 - MAX_RESOLUTION

Outputs

Output Name	Description	Data Type
model	The modified model with Flux sampling configuration applied	MODEL

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