> ## 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.

# LatentConcat - ComfyUI Built-in Node Documentation

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

The LatentConcat node combines two latent samples along a specified dimension. It takes two latent inputs and concatenates them together along the chosen axis (x, y, or t dimension). The node automatically adjusts the batch size of the second input to match the first input before performing the concatenation operation.

## Inputs

| Parameter  | Data Type | Required | Range                                                           | Description                                                                                                                                                             |
| ---------- | --------- | -------- | --------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `samples1` | LATENT    | Yes      | -                                                               | The first latent sample to concatenate                                                                                                                                  |
| `samples2` | LATENT    | Yes      | -                                                               | The second latent sample to concatenate                                                                                                                                 |
| `dim`      | COMBO     | Yes      | `"x"`<br />`"-x"`<br />`"y"`<br />`"-y"`<br />`"t"`<br />`"-t"` | The dimension along which to concatenate the latent samples. Positive values concatenate samples1 before samples2, negative values concatenate samples2 before samples1 |

**Note:** The second latent sample (`samples2`) is automatically adjusted to match the batch size of the first latent sample (`samples1`) before concatenation.

## Outputs

| Output Name | Data Type | Description                                                                                                  |
| ----------- | --------- | ------------------------------------------------------------------------------------------------------------ |
| `output`    | LATENT    | The concatenated latent samples resulting from combining the two input samples along the specified dimension |