Practical overview
When it fits
Use it in a ComfyUI image-generation workflow when you want to test alternative CFG behavior, reduce burn-like artifacts, or experiment with the extension’s conditional guidance and speed controls.
Who it is for
- ComfyUI users who want to experiment with CFG rescaling and image intensity.
- Stable Diffusion workflow builders exploring guidance-related sampling speed options.
Documented uses
- Rescale CFG across sampling steps to influence overall image intensity.
- Use negative-strength interpolation to adjust the relationship between conditioned and unconditioned guidance.
- Experiment with a boost option that disables negative guidance near sigma values of 1.
Requirements & limits
- The extension changes the meaning of the sampler’s CFG scale; the README suggests 8 as a starting point, not a universal setting.
- The project reports PixArt Sigma support.
- For SD3, the README specifies use without boost or unconditional-guidance cutting.
- Presets are evaluated with eval() and may execute malicious code, so the project advises trusting the preset source.
Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.
Use AutomaticCFG in a ComfyUI workflow
Connect AutomaticCFG to a sampler and try its self-rescaling CFG behavior.
Before you start
- A ComfyUI workflow with a sampler.
Steps
Add the AutomaticCFG node from the ComfyUI model_patches category to the workflow.
Connect the node to the sampler so it can rescale CFG during sampling.
Try setting the sampler CFG to 8 as the README’s starting point; adjust it to explore changes in output intensity, brightness, saturation, or sharpness.
Expected outcome
The connected node changes the sampler’s CFG behavior through per-step rescaling, with CFG serving as a control for output intensity rather than its usual meaning.
Guide limitations
- CFG values no longer behave as ordinary CFG values; results may differ from standard sampling.
- The README describes CFG 8 as a suggested starting point, not a guaranteed result.
- For SD3, do not use boost or cut the unconditional guidance; the README says 20 steps works nicely.
- Presets are interpreted with eval() and may execute malicious code, so only use presets from trusted sources.
Enable boost guidance behavior
Use the boost toggle to disable negative guidance near sigma values of 1.
Before you start
- An AutomaticCFG node connected in a ComfyUI workflow.
Steps
Enable the node’s boost toggle.
Run the workflow with the node connected; boost turns off negative guidance when sigmas are near 1.
Expected outcome
Negative guidance is disabled near sigma 1; the README says this doubles inference speed.
Guide limitations
- The speed claim is the repository author’s reported behavior and is not a guaranteed result.
- Do not use boost with SD3, according to the README’s stated limitation.
Sources & review
Source record details
- Source availability
- Active
- Sources checked
- 16 October 2026
- Original website title
- Extraltodeus/ComfyUI-AutomaticCFG · Official homepage title · retained in its source language
Related options
Skimmed_CFG — The repository README recommends moving to this project.
pre_cfg_comfy_nodes_for_ComfyUI — The README says most other functionalities were recreated in this repository.