> ## 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.

# Flux3MaxTextToVideoNode - ComfyUI Built-in Node Documentation

> FLUX 3 Max Text to Video generates a video with synchronized audio from a text prompt.

FLUX 3 Max Text to Video generates a video with synchronized audio from a text prompt. The prompt is interpreted and expanded by FLUX 3 Max before rendering, the node waits for the render to finish, and the finished clip is returned.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| - | - | - | - | - |
| `prompt` | What the clip should show, in plain language. Describe ambient sound, music and speech separately for layered audio (default: empty). | STRING | Yes | Multiline text |
| `aspect_ratio` | Output aspect ratio. `"auto"` is 16:9 for text prompts (default: `"auto"`). | COMBO | Yes | `"auto"` `"21:9"` `"2:1"` `"16:9"` `"4:3"` `"1:1"` `"3:4"` `"9:16"` |
| `duration` | Clip length in seconds (default: `"5"`). | COMBO | Yes | `"5"` `"6"` `"7"` `"8"` `"9"` `"10"` `"11"` `"12"` `"13"` `"14"` `"15"` `"16"` `"17"` `"18"` `"19"` `"20"` |
| `resolution` | Output resolution (default: `"720p"`). | COMBO | Yes | `"720p"` `"1080p"` |
| `reasoning_level` | How much the model reasons about and expands the prompt before generating. `"high"` takes longer; the price is the same (default: `"high"`). | COMBO | Yes | `"low"` `"high"` |
| `generate_audio` | Generate synchronized audio. Off produces a video with no audio track (default: true). | BOOLEAN | Yes | `true` `false` |
| `seed` | Seed controlling whether the node re-runs. Results are non-deterministic regardless of this value (default: 42). | INT | Yes | 0 to 2147483646 |

Note: `prompt` must contain at least one character. The displayed price is based on `resolution` and `duration`: 720p is charged at $0.060775 per second and 1080p at $0.103675 per second until November 7, 2026, and at $0.2431 and $0.4147 per second after that date. The total estimated cost for the clip is shown in the UI.

## Outputs

| Output Name | Description | Data Type |
| - | - | - |
| `video` | The generated video clip, with synchronized audio when `generate_audio` is enabled. | VIDEO |

> 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/Flux3MaxTextToVideoNode/en.md)

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