# Seedance 2.0

> ByteDance's multimodal video generation model with native audio, multimodal reference inputs (up to 9 images, 3 videos, 3 audios), and intelligent duration control. Supports text-to-video, image-to-video, video editing/extension, and lip-sync.

- **Provider**: replicate
- **Model ID**: bytedance/seedance-2.0
- **Category**: video_generation
- **Credits**: 2090 per request
- **Pricing Type**: input_based

## API Endpoint

Base URL: https://api.core.today/v1

### Create Prediction
POST /predictions

### Get Status
GET /predictions/{job_id}

### Cancel
DELETE /predictions/{job_id}

## Authentication

Header: `X-API-Key: YOUR_API_KEY`

## Input Parameters

- `generate_audio` (boolean, optional): Generate synchronized audio with the video, including dialogue (use double quotes in prompt), sound effects, and background music. (Default: `True`)
- `aspect_ratio` (string, optional): Video aspect ratio. Set to 'adaptive' to let the model choose the best ratio based on inputs. (Default: `16:9`; Options: `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `21:9`, `9:21`, `adaptive`)
- `seed` (integer, optional): Random seed. Set for reproducible generation.
- `reference_images` (array, optional): Reference images (up to 9) for character consistency, style guidance, and scene composition. Cannot be used together with first/last frame images. You can reference them in your prompt as [Image1], [Image2], etc. (Default: `[]`)
- `last_frame_image` (string, optional): Input image for last frame generation. Only works if a first frame image is also provided. Cannot be combined with reference images.
- `prompt` (string, **required**): Text prompt for video generation. Maximum 4000 characters. BytePlus recommends keeping prompts under 600 English words for best results.
- `image` (string, optional): Input image for image-to-video generation (first frame). Cannot be combined with reference images.
- `reference_videos` (array, optional): Reference videos (up to 3, total duration max 15s) for motion transfer, style reference, and editing. Reference them in your prompt as [Video1], [Video2], etc. (Default: `[]`)
- `reference_audios` (array, optional): Reference audio files (up to 3, total duration max 15s) for audio-driven generation and lip-sync. Requires at least one reference image or video. Reference them in your prompt as [Audio1], [Audio2], etc. (Default: `[]`)
- `duration` (integer, optional): Video duration in seconds. Set to -1 for intelligent duration (model picks the best length). (Default: `5`; Range: min: -1, max: 15)
- `resolution` (string, optional): Video resolution. 4K outputs 10-bit H.265/HEVC at high bitrate. (Default: `720p`; Options: `480p`, `720p`, `1080p`, `4k`)

## Example Request

```json
{
  "model": "bytedance/seedance-2.0",
  "input": {
    "duration": 5,
    "aspect_ratio": "16:9",
    "generate_audio": true,
    "prompt": "A cozy cabin in a snowy forest at night, warm light glowing from the windows, gentle snowfall, camera slowly pushing in through the trees",
    "resolution": "720p"
  }
}
```

## Response Format

```json
{
  "job_id": "abc123",
  "status": "pending",
  "provider": "replicate",
  "model": "black-forest-labs/flux-schnell",
  "created_at": "2026-01-01T00:00:00Z",
  "result": null,
  "error": null
}
```

Status values: `pending`, `processing`, `completed`, `failed`, `cancelled`

## Usage Flow

1. POST /predictions with model and input → receive job_id
2. Poll GET /predictions/{job_id} until status is `completed` or `failed`
3. Result contains output URL(s) or data

## Output Type

url

## Tags

bytedance, seedance, video-generation, text-to-video, image-to-video, multimodal-reference, native-audio, lip-sync, video-editing

## Documentation

https://replicate.com/bytedance/seedance-2.0