ai-toolkit-trainer

1# AI-Toolkit LoRA Trainer (WAN 2.2 & Z-Image)
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3## Overview
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5AI-Toolkit by ostris is an MIT-licensed trainer for finetuning diffusion models. It is a standalone trainer with its own web UI, not a ComfyUI custom node. It runs a Node.js UI front end over a Python (`run.py`) training backend and trains LoRAs for many model families. This skill covers the WAN 2.2 / 2.1 video models and Z-Image (Turbo & Base).
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7- Repo: `https://github.com/ostris/ai-toolkit` (cloned by the installers).
8- Backend: `python run.py config/<job>.yml`. UI: a Node.js app under `ui/` that schedules and monitors jobs. You do not have to keep the UI open while a job runs.
9- Output: a standard `.safetensors` LoRA you drop into ComfyUI `models/loras/` and load with `LoraLoaderModelOnly`.
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11Best for:
12- WAN LoRAs. A person or character, an art style, or a specific camera or video motion, trained from image or video clip datasets. For *using* WAN see wan-t2v-video / wan-flf-video.
13- Z-Image LoRAs. Fast, very low-VRAM image LoRAs (faces, characters, outfits, styles) on the 6B Z-Image base/turbo. For *using* Z-Image see z-image-base / z-image-turbo, and the z-image-xy-plot pack to compare trained LoRAs.
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15For low-VRAM anime image LoRAs on a different stack (kohya `sd-scripts`), see the sibling anima-lora-trainer.
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