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

# SamplerSASolver - ComfyUI Built-in Node Documentation

> The SamplerSASolver node creates and configures a custom sampler for diffusion models.

The SamplerSASolver node creates and configures a custom sampler for diffusion models. It uses the "sa\_solver" sampling algorithm with a configurable predictor-corrector scheme and stochastic differential equation (SDE) settings, returning a sampler object that can be plugged into a sampling node. The `sde_start_percent` and `sde_end_percent` values are converted into sigma values using the connected model's sampling schedule to define the interval in which the stochastic component is applied.

## Inputs

| Parameter           | Description                                                                                                                                                   | Data Type | Required | Range       |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | -------- | ----------- |
| `model`             | The diffusion model whose sampling schedule is used to build the sampler                                                                                      | MODEL     | Yes      | -           |
| `eta`               | Controls the step size scaling factor of the SDE solver (default: 1.0)                                                                                        | FLOAT     | No       | 0.0 - 10.0  |
| `sde_start_percent` | Starting percentage of the sampling process where the stochastic (SDE) component begins; converted to a sigma value using the model's schedule (default: 0.2) | FLOAT     | No       | 0.0 - 1.0   |
| `sde_end_percent`   | Ending percentage of the sampling process where the stochastic (SDE) component stops; converted to a sigma value using the model's schedule (default: 0.8)    | FLOAT     | No       | 0.0 - 1.0   |
| `s_noise`           | Controls the amount of noise added during sampling (default: 1.0)                                                                                             | FLOAT     | No       | 0.0 - 100.0 |
| `predictor_order`   | The order of the predictor component in the solver (default: 3)                                                                                               | INT       | No       | 1 - 6       |
| `corrector_order`   | The order of the corrector component in the solver (default: 4)                                                                                               | INT       | No       | 0 - 6       |
| `use_pece`          | Enables the PECE (Predict-Evaluate-Correct-Evaluate) method (default: disabled)                                                                               | BOOLEAN   | No       | -           |
| `simple_order_2`    | Enables simplified second-order calculations (default: disabled)                                                                                              | BOOLEAN   | No       | -           |

All optional inputs are marked as advanced in the interface.

## Outputs

| Output Name | Description                                                                                      | Data Type |
| ----------- | ------------------------------------------------------------------------------------------------ | --------- |
| `sampler`   | A configured sampler object (using the `sa_solver` algorithm) that can be used by sampling nodes | SAMPLER   |

> 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)

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