> ## 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.

# SamplerSASolver - ComfyUI Built-in Node Documentation

> Complete documentation for the SamplerSASolver 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/SamplerSASolver/en.md)

The SamplerSASolver node implements a custom sampling algorithm for diffusion models. It uses a predictor-corrector approach with configurable order settings and stochastic differential equation (SDE) parameters to generate samples from the input model.

## Inputs

| Parameter           | Data Type | Required | Range       | Description                                                             |
| ------------------- | --------- | -------- | ----------- | ----------------------------------------------------------------------- |
| `model`             | MODEL     | Yes      | -           | The diffusion model to use for sampling                                 |
| `eta`               | FLOAT     | Yes      | 0.0 - 10.0  | Controls the step size scaling factor (default: 1.0)                    |
| `sde_start_percent` | FLOAT     | Yes      | 0.0 - 1.0   | The starting percentage for SDE sampling (default: 0.2)                 |
| `sde_end_percent`   | FLOAT     | Yes      | 0.0 - 1.0   | The ending percentage for SDE sampling (default: 0.8)                   |
| `s_noise`           | FLOAT     | Yes      | 0.0 - 100.0 | Controls the amount of noise added during sampling (default: 1.0)       |
| `predictor_order`   | INT       | Yes      | 1 - 6       | The order of the predictor component in the solver (default: 3)         |
| `corrector_order`   | INT       | Yes      | 0 - 6       | The order of the corrector component in the solver (default: 4)         |
| `use_pece`          | BOOLEAN   | Yes      | -           | Enables or disables the PECE (Predict-Evaluate-Correct-Evaluate) method |
| `simple_order_2`    | BOOLEAN   | Yes      | -           | Enables or disables simplified second-order calculations                |

## Outputs

| Output Name | Data Type | Description                                                        |
| ----------- | --------- | ------------------------------------------------------------------ |
| `sampler`   | SAMPLER   | A configured sampler object that can be used with diffusion models |