> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# SamplerDPMAdaptative - ComfyUI Built-in Node Documentation

> Complete documentation for the SamplerDPMAdaptative node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/SamplerDPMAdaptative/en.md)

The SamplerDPMAdaptative node implements an adaptive DPM (Diffusion Probabilistic Model) sampler that automatically adjusts step sizes during the sampling process. It uses tolerance-based error control to determine optimal step sizes, balancing computational efficiency with sampling accuracy. This adaptive approach helps maintain quality while potentially reducing the number of steps needed.

## Inputs

| Parameter       | Data Type | Required | Range     | Description                                                   |
| --------------- | --------- | -------- | --------- | ------------------------------------------------------------- |
| `order`         | INT       | Yes      | 2-3       | The order of the sampler method (default: 3)                  |
| `rtol`          | FLOAT     | Yes      | 0.0-100.0 | Relative tolerance for error control (default: 0.05)          |
| `atol`          | FLOAT     | Yes      | 0.0-100.0 | Absolute tolerance for error control (default: 0.0078)        |
| `h_init`        | FLOAT     | Yes      | 0.0-100.0 | Initial step size (default: 0.05)                             |
| `pcoeff`        | FLOAT     | Yes      | 0.0-100.0 | Proportional coefficient for step size control (default: 0.0) |
| `icoeff`        | FLOAT     | Yes      | 0.0-100.0 | Integral coefficient for step size control (default: 1.0)     |
| `dcoeff`        | FLOAT     | Yes      | 0.0-100.0 | Derivative coefficient for step size control (default: 0.0)   |
| `accept_safety` | FLOAT     | Yes      | 0.0-100.0 | Safety factor for step acceptance (default: 0.81)             |
| `eta`           | FLOAT     | Yes      | 0.0-100.0 | Stochasticity parameter (default: 0.0)                        |
| `s_noise`       | FLOAT     | Yes      | 0.0-100.0 | Noise scaling factor (default: 1.0)                           |

## Outputs

| Output Name | Data Type | Description                                        |
| ----------- | --------- | -------------------------------------------------- |
| `sampler`   | SAMPLER   | Returns a configured DPM adaptive sampler instance |