# Seedance 1.5 Pro (251215)

> ByteDance video generation model with audio-visual sync for text-to-video and image-to-video.

## Key facts

- Model author: ByteDance
- Input: $2.40 per 1M tokens
- Output: $2.40 per 1M tokens
- Input modalities: image, text
- Output modalities: audio, video
- Released: 2025-12-15
- Model IDs: `byteplus/seedance-1-5-pro-251215`
- Model page: https://www.realrelay.ai/model/bytedance/seedance-1-5-pro-251215

## Overview

Seedance 1.5 Pro (251215) is a video generation model from ByteDance. BytePlus lists it with audio-visual sync and three input modes: text-to-video, image-to-video from a first frame, and image-to-video from first and last frames. Its price depends on whether the output includes audio.

It accepts text and image input and returns video and audio. It was released on December 15, 2025.

## Capabilities

Seedance 1.5 Pro (251215) generates video from a text prompt or from an image. Documented modes are text-to-video, image-to-video from a first frame, and image-to-video from first and last frames.

BytePlus marks the model as audio-visual sync, and it prices video with audio and video without audio differently.

## Pricing

Seedance 1.5 Pro (251215) is priced at $2.40 per 1M tokens for both input and output.

The rate shown is for video with audio; BytePlus lists a lower rate for video without audio. Seedance 1.5 Pro (251215) is available through RealRelay's OpenAI-compatible API.

## Use cases

Use Seedance 1.5 Pro (251215) for clips where sound matters, such as a short advertisement or social video generated from a text prompt with audio produced together with the picture.

Its first-and-last-frame mode suits transitions, where you supply a start image and an end image and the model generates the motion between them.

## FAQ

### What is Seedance 1.5 Pro (251215)?

Seedance 1.5 Pro (251215) is a ByteDance video generation model with audio-visual sync, offering text-to-video and image-to-video from a first frame or from first and last frames.

### How much does Seedance 1.5 Pro (251215) cost?

Seedance 1.5 Pro (251215) is priced at $2.40 per 1M tokens for both input and output.

### What inputs and outputs does Seedance 1.5 Pro (251215) support?

Seedance 1.5 Pro (251215) accepts text and image input and returns video and audio.

### Does Seedance 1.5 Pro (251215) generate audio with video?

Yes. BytePlus lists audio-visual sync for Seedance 1.5 Pro (251215) and prices video with audio separately from video without audio.

### When was Seedance 1.5 Pro (251215) released?

Seedance 1.5 Pro (251215) was released on December 15, 2025.

### How do I call Seedance 1.5 Pro (251215) via the API?

Send requests to RealRelay's OpenAI-compatible API with the model ID byteplus/seedance-1-5-pro-251215 to use Seedance 1.5 Pro (251215).