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

# Seedance 2 Fast

> ByteDance's fast Seedance tier on Kyma. Quick generation, ~20% cheaper than Pro, native audio bundled, pay per second.

## Overview

`seedance-2-fast` is the quicker Seedance variant — same family behavior as `seedance-2-pro`, \~20% cheaper per second, faster turnaround. Native audio bundled. 720p output. Right for short social clips, UI motion, and rapid iteration where round-trip time beats absolute polish.

## Specs

| Field             | Value                                                    |
| ----------------- | -------------------------------------------------------- |
| Model ID          | `seedance-2-fast`                                        |
| Creator           | ByteDance                                                |
| Best for          | Social shorts, UI motion, rapid iteration, product demos |
| Default duration  | 5 seconds                                                |
| Max duration      | 10 seconds                                               |
| Input modalities  | Text, image (I2V)                                        |
| Output modalities | Video, audio                                             |
| Resolution        | 720p                                                     |
| Audio             | Bundled                                                  |
| Pricing mode      | Per second                                               |

## Pricing

|                 |    Cost    |
| --------------- | :--------: |
| Per second      | \$0.326565 |
| Default 5s clip |  \$1.63283 |

## Use this when

* You're iterating on prompts and need fast turnaround.
* You're producing many short social clips per day.
* You can accept \~20% less polish than `seedance-2-pro` for the cost saving.

## Pick something else when

* The clip needs flagship Seedance polish: use [`seedance-2-pro`](/models/seedance-2-pro).
* You want a 1080p cinematic look (not 720p): use [`kling-3-pro`](/models/kling-3-pro) or [`kling-3-pro-audio`](/models/kling-3-pro-audio).
* You need the cheapest cinematic Kling tier: use [`kling-2.5-pro`](/models/kling-2.5-pro).

## Example

```bash theme={null}
curl -X POST https://kymaapi.com/v1/videos/generations \
  -H "Authorization: Bearer $KYMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2-fast",
    "prompt": "a phone notification slides in from the right, soft chime, clean UI background",
    "duration": 5
  }'
```

The endpoint is async — POST returns `202` with a `job_id`; poll [`GET /v1/jobs/{id}`](/api-reference/videos-generations#poll-for-the-result) until status is `succeeded`.

## See also

* [Video Generation](/models/video-generation) — full family overview
* [`seedance-2-pro`](/models/seedance-2-pro) — same family at flagship quality
* [`POST /v1/videos/generations`](/api-reference/videos-generations) — endpoint reference