BytePlus: Seedance 1.5 Pro
byteplus/seedance-1-5-pro-251215
Access Seedance 1.5 Pro from BytePlus using the Puter.js AI API.
Add to your app
Model Card
Seedance 1.5 Pro is ByteDance's audio-visual joint generation model, released in December 2025 and available here through BytePlus's hosting. Unlike earlier Seedance versions, it generates video and audio together in a single pass rather than adding sound afterward, with multi-language lip sync covering Chinese, English, Japanese, Korean, Spanish, and Indonesian, plus Sichuan and Cantonese dialects, and support for cinematic camera moves such as dolly zooms.
ByteDance evaluates it on SeedVideoBench 1.5, a benchmark it built with film directors covering prompt following, motion quality, and audio-visual sync, and says the model leads on these measures; no numeric score has been published. Through this API it supports 480p, 720p, and 1080p at up to 12 seconds and 24fps.
It targets production use cases with dialogue or sound design built in, such as short dramas, advertising, and animation, where earlier text/image-only Seedance versions would need a separate audio step.
Max Duration 5s
seconds
Frame Rate N/A
fps
Aspect Ratio N/A
supported
Release Date Dec 15, 2025
Add Seedance 1.5 Pro to your app
Use Seedance 1.5 Pro in your app with the Puter.js AI API, no API keys or setup required.
// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.txt2vid("A cat playing with a ball of yarn", {
model: "byteplus/seedance-1-5-pro-251215"
}).then(video => {
document.body.appendChild(video);
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.txt2vid("A cat playing with a ball of yarn", {
model: "byteplus/seedance-1-5-pro-251215"
}).then(video => {
document.body.appendChild(video);
});
</script>
</body>
</html>
More AI Models From BytePlus
Dola Seed 2.1 Turbo
Dola Seed 2.1 Turbo is ByteDance's faster, lower-cost variant in the Seed 2.1 family, offered internationally through BytePlus's Model Ark platform. It accepts text, image, and video input, with a 256K context window and function calling for agent workflows. On ByteDance's own benchmarks against Claude Opus 4.7, GPT-5.5, and Gemini 3.1 Pro, Turbo scores 89 on VideoMME for long video understanding and 79.2 on OVOBench for streaming video, ahead of Gemini 3.1 Pro's 86.7 and 64.1. It scores 88.0 on BeyondAIME reasoning, above Seed 2.1 Pro's 87.0. On knowledge tests like SuperGPQA it trails GPT-5.5 and Gemini. These are vendor-reported figures, not independently verified. It suits high-volume API use such as video analysis, document processing, and agent pipelines, where cost and video handling matter more than peak coding scores.
ImageDola Seedream 5.0 Pro
Dola Seedream 5.0 Pro is ByteDance's Seedream 5.0 Pro image generation and editing model, offered here through BytePlus's ModelArk API under the "Dola" branding BytePlus uses across its hosted model lineup. It generates images as independently editable layers, separating subjects, text, and background so pieces can be repositioned or swapped after generation. It supports pixel-level editing through selection points, arrows, and annotation boxes, reads color codes and material specifications, and renders text across 14 or more languages including Arabic, Korean, Thai, French, Russian, and Japanese. On Artificial Analysis's independent Text-to-Image Elo leaderboard it scores 1,283, ranking 8th overall, ahead of Black Forest Labs' FLUX.2 Max (1,233) and just behind Google's Nano Banana Pro (1,299). It fits production teams that need layered, editable output and multilingual text rather than a single flattened image.
VideoDreamina Seedance 2.5
Dreamina Seedance 2.5 is ByteDance's newest Seedance video model, distributed under the Dreamina brand and hosted here through BytePlus. It follows Seedance 2.0, extending single-pass clips from 15 seconds to 30 seconds, with support for multi-round extension beyond that. Through this API it renders at 480p, 720p, or 1080p at 24fps, dropping the 4K tier that 2.0 offered. Reference input also grows. ByteDance says it can combine up to 50 assets in one generation call, including up to 30 images, 10 video clips, and 10 audio clips alongside a text prompt, plus native audio-video generation in a single pass and timestamp-level editing for adjusting specific segments of a clip. ByteDance also reports improved texture, lighting, and motion detail over 2.0. It suits the same production use cases as the 2.0 family, such as marketing clips and multi-shot sequences, now with longer single takes and more reference material to work from.
Frequently Asked Questions
You can access Seedance 1.5 Pro by BytePlus through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required.
Seedance 1.5 Pro is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.
Seedance 1.5 Pro was created by BytePlus and released on Dec 15, 2025.
Yes — the Seedance 1.5 Pro API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.
Add Seedance 1.5 Pro to your app for free
Developers can integrate Seedance 1.5 Pro for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.