# Seedance v1.0 Pro Fast

Seedance v1.0 Pro Fast stays on Seedance 1.0 Pro's output tier while cutting generation time by approximately 3x and per-clip cost by approximately 72%.

- **Model ID:** `bytedance/seedance-v1.0-pro-fast`
- **Type:** video
- **Providers:** bytedance
- **Context window:** Not applicable
- **Maximum output tokens:** 0
- **Pricing:** See the provider details below
- **Canonical page:** https://vercel.com/ai-gateway/models/seedance-v1.0-pro-fast

## Supported parameters

- **Parameters:** `aspectRatio`, `resolution`, `duration`, `fps`
- **Operations:** `text-to-video`, `image-to-video`
- **Input modalities:** `text`, `image`
- **Output modalities:** `video`
- **Aspect ratios:** `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `21:9`
- **Resolutions:** `720p`, `1080p`
- **Durations:** `2s`, `3s`, `4s`, `5s`, `6s`, `7s`, `8s`, `9s`, `10s`, `11s`, `12s`
- **Frame rates:** `24 fps`
- **Maximum outputs per request:** Not reported
- **Maximum input images:** 1
- **Input image formats:** `jpeg`, `png`, `webp`, `bmp`, `tiff`, `gif`
- **Maximum input image size:** 30 MB

## Example

```ts
import { experimental_generateVideo as generateVideo } from 'ai';

const result = await generateVideo({
  model: 'bytedance/seedance-v1.0-pro-fast',
  prompt: 'A serene mountain lake at sunrise.'
});
```

## About

Seedance v1.0 Pro Fast targets maximum generation speed and cost efficiency while staying in the Pro quality tier. It generates approximately 3x faster at 72% lower cost per clip than Seedance 1.0 Pro while maintaining 1080p output at 24 fps for the same two- to 12-second duration range.

The model supports both text-to-video and image-to-video input modes, accepts 480p, 720p, and 1080p output resolutions, and offers the same seven aspect ratios as Pro. It renders detail in facial features and hair textures, reproduces styles consistently from reference images, and handles physically complex motion scenes. Prompt comprehension matches standard Pro for action intentions, character relationships, and scene changes, with lower wall-clock time.

For product teams building user-facing generation features, Seedance v1.0 Pro Fast expands what you can run synchronously. At 3x the speed of standard Pro, many requests that previously required async job queuing and webhooks fit inside acceptable synchronous windows. That simplifies application architecture and shortens wait times.

See https://console.byteplus.com/ark/region:ark+ap-southeast-1/model/detail?Id=seedance-1-0-pro-fast for Pro Fast methodology and comparisons with standard Pro.

## What to consider

Pro Fast's speed advantage makes it a practical default for interactive applications. Verify that your provider tier supports the required concurrency before you enable synchronous generation in user-facing flows. Compare rates (N/A; N/A).

## When to use

### Best For

- Interactive or near-real-time generation in user-facing applications where latency directly affects product quality
- High-volume production pipelines where the approximately 72% cost reduction over standard Pro compounds across thousands of daily clips
- A/B testing and iterative creative workflows where rapid variation generation enables faster decisions without Lite-tier quality compromises
- Campaigns requiring many individualized video assets, such as personalized marketing, where speed and cost scale together

### Consider Alternatives When

- You have no latency or cost pressure and want the absolute quality ceiling. Use Seedance 1.0 Pro
- Your source input is a text-only prompt and Lite-tier quality suffices. Lite T2V offers further cost reduction
- You need audio-synchronized voice and sound effects alongside the video. Use Seedance 1.5 Pro

## Best for

- **Near-real-time generation:** User-facing applications where latency directly affects product quality
- **High-volume production:** The approximately 72% cost reduction over standard Pro compounds across thousands of daily clips
- **A/B testing and iteration:** Rapid variation generation enables faster creative decisions without Lite-tier quality compromises
- **Personalized video campaigns:** Many individualized video assets where speed and cost scale together

## Consider alternatives

- **Absolute quality ceiling:** Seedance 1.0 Pro suits workflows with no latency or cost pressure
- **Lite-tier quality suffices:** Lite T2V offers further cost reduction for text-only prompts
- **Audio-synchronized video:** Seedance 1.5 Pro adds native voice and sound effects alongside the video

## Frequently asked questions

### How much faster is Seedance v1.0 Pro Fast compared to Seedance 1.0 Pro?

Approximately 3x faster, with generation costs approximately 72% lower per clip than the standard Pro tier.

### Does Pro Fast support image-to-video as well as text-to-video?

Yes. Both T2V and I2V input modalities are supported, with the same resolution and duration options as Pro (480p, 720p, 1080p; two to 12 seconds).

### Is the video quality of Pro Fast visually distinguishable from standard Pro?

In most cases, no. Pro Fast preserves Pro's facial detail rendering, style consistency, and physical motion accuracy. Edge cases may differ under extreme creative direction.

### What output formats does Seedance v1.0 Pro Fast generate?

MP4 files at 24 fps in the selected resolution and aspect ratio.

### Can Pro Fast be used for interactive in-app video generation?

Yes. The 3x speed advantage over standard Pro makes Pro Fast appropriate for synchronous application flows where standard Pro would require async job queuing.

### What rate limits apply to Seedance v1.0 Pro Fast through AI Gateway?

Rate limits depend on the provider level. Review available providers for documented limits before designing high-concurrency pipelines.

## Links

- [Model page](https://vercel.com/ai-gateway/models/seedance-v1.0-pro-fast)
- [AI Gateway documentation](https://vercel.com/docs/ai-gateway)
- [Provider model documentation](https://console.byteplus.com/ark/region:ark+ap-southeast-1/model/detail?Id=seedance-1-0-pro-fast)
- [Provider pricing](https://docs.byteplus.com/en/docs/ModelArk/1544106)