LossGraphNode - ComfyUI Built-in Node Documentation - ComfyUI

The LossGraphNode creates a line chart of training loss values over training steps and shows it as a preview image. It reads loss values from a training node, plots them on a graph with labeled axes and min/max loss values, and returns the graph as an image preview in the UI.

Inputs

Parameter	Description	Data Type	Required	Range
`loss`	Loss map from training node. It must contain a `loss` key with a list of numeric loss values.	LOSS_MAP	Yes	-
`filename_prefix`	Prefix for the saved loss graph image. (default: “loss_graph”)	STRING	Yes	-

Outputs

Output Name	Description	Data Type
`ui.images`	The generated loss graph image displayed as a preview.	IMAGE

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