Bash version

[Fmstrat]

In case you want a super-short bash script that does the same thing:

#!/bin/bash

USED_MODELS=$(perl -nle 'while (/\[([^ \]]*\.[^ \]]*)\]/g) { print $1 }' ~/Documents/ComfyUI/user/default/workflows/*.json |grep -v '{' |sed 's/"//g;s/,/ /g')
MODELS=$(find /Users/user/Documents/ComfyUI/models -type f |grep -v "\.cache")

for MODEL in ${MODELS}; do
	BASE_NAME=$(basename "${MODEL}")
	FOUND=false
	for USED_MODEL in ${USED_MODELS}; do
		if [ "${BASE_NAME}" = "${USED_MODEL}" ]; then
			FOUND=true
			break
		fi
	done
	if [ "${FOUND}" = "false" ]; then
		echo "rm '${MODEL}'"
	fi
done

[blueraincoatli]

Thanks for sharing! That script is super clean. 🚀
I mainly built this node because a lot of ComfyUI users are artists or designers who might not be comfortable with coding or the terminal. This is a visual way to handle this right inside ComfyUI, plus some safety nets like 'Recycle Bin' and 'Backup' so they don't accidentally delete stuff.
But for power users, your script is definitely a solid lightweight alternative!