Image generation
ComfyUI-nunchaku
Runs image models in 4-bit so smaller GPUs can keep up
★ 2.9k
February 2026
Apache-2.0
Image generation
What we checked ourselves
Not copied from the project's own blurb. These are things we opened and verified, with the date.
- 23 Aug 2026We checked that the link to the project still resolves.
- 14 Aug 2026We read the licence text itself (null). No unusual restrictions were stated.
- 1 Sept 2026We read the project's own documentation and found no sign that development has stopped.
Where this sits among the 210 tools we list in Image generation
- No API key required195 of 210
- Commercial use confirmed as allowed75 of 210
- Requires terminal commands180 that do not →
- Sends your input to the provider33 that do not →
Only 66 of the 210 meet all of the conditions above.
Counted from our own checks: every tool we list is examined against the same criteria.
What it does
A ComfyUI plugin for Nunchaku, an inference engine for 4-bit models quantised with SVDQuant, which cuts VRAM requirements enough that models previously out of reach become runnable, and speeds up generation along the way. Quantisation is a trade — output can differ from the full-precision original — and GPU compatibility is specific, so check the support matrix first. Commercial use follows the underlying model's licence, not this plugin's. Apache-2.0.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals
Before you start
- Setup difficultySome setup needed
- Command lineRequired
- API keyNot required
- Sends data onlineYes
Judged automatically from the project's own metadata. Always confirm on the official page.
ComfyUI-nunchaku FAQ
- Is ComfyUI-nunchaku free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use ComfyUI-nunchaku?
- It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.
- Does ComfyUI-nunchaku work on a phone?
- No. It needs a computer.
- Can I use ComfyUI-nunchaku commercially?
- The licence is Apache-2.0, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| ComfyUI-nunchaku (this page) | Required | Not needed | Yes | No | Yes |
| ComfyUI-Custom-Scripts | Required | Not needed | Yes | No | Yes |
| comfyui-photoshop | Required | Not needed | No | No | Not verified |
| ComfyUI_Custom_Nodes_AlekPet | Required | Required | Yes | No | Yes |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.