⚡ Quick Answer
A sampler is the algorithm ComfyUI's KSampler node uses to remove noise from a latent image, step by step, until a finished picture appears. Different samplers — euler, dpmpp_2m, and others — take different mathematical routes to get there, which changes speed, detail, and sometimes composition.
Every image ComfyUI generates starts as random noise. The sampler is what decides, at each step, exactly how that noise gets predicted and removed. Same prompt, same checkpoint, different sampler — and you can still end up with a noticeably different result.
Where You'll See It
The sampler_name dropdown sits inside the KSampler node, right next to scheduler. They're two separate settings that work as a pair — the sampler is the algorithm, the scheduler is the pacing that algorithm follows across your steps.
Quick Example
euler is fast and simple — a solid default for testing prompts quickly. dpmpp_2m is slower but often produces sharper, more refined detail. dpmpp_2m_sde adds a touch of extra texture and variation, even at the same seed.
Frequently Asked Questions
See It In Action
Ready to run your first workflow?
Our text-to-image guide walks through every KSampler setting, including sampler and scheduler pairing.
Published: 2026-08-25 · Last updated: 2026-08-25
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