Seedance 1.5 pro: A Native Audio-Visual Joint Generation Foundation Model
Authors: name: Heyi Chen, name: Siyan Chen, name: Xin Chen, name: Yanfei Chen, name: Ying Chen, name: Zhuo Chen, name: Feng Cheng, name: Tianheng Cheng, name: Xinqi Cheng, name: Xuyan Chi, name: Jian Cong, name: Jing Cui, name: Qinpeng Cui, name: Qide Dong, name: Junliang Fan, name: Jing Fang, name: Zetao Fang, name: Chengjian Feng, name: Han Feng, name: Mingyuan Gao, name: Yu Gao, name: Dong Guo, name: Qiushan Guo, name: Boyang Hao, name: Qingkai Hao, name: Bibo He, name: Qian He, name: Tuyen Hoang, name: Ruoqing Hu, name: Xi Hu, name: Weilin Huang, name: Zhaoyang Huang, name: Zhongyi Huang, name: Donglei Ji, name: Siqi Jiang, name: Wei Jiang, name: Yunpu Jiang, name: Zhuo Jiang, name: Ashley Kim, name: Jianan Kong, name: Zhichao Lai, name: Shanshan Lao, name: Yichong Leng, name: Ai Li, name: Feiya Li, name: Gen Li, name: Huixia Li, name: JiaShi Li, name: Liang Li, name: Ming Li, name: Shanshan Li, name: Tao Li, name: Xian Li, name: Xiaojie Li, name: Xiaoyang Li, name: Xingxing Li, name: Yameng Li, name: Yifu Li, name: Yiying Li, name: Chao Liang, name: Han Liang, name: Jianzhong Liang, name: Ying Liang, name: Zhiqiang Liang, name: Wang Liao, name: Yalin Liao, name: Heng Lin, name: Kengyu Lin, name: Shanchuan Lin, name: Xi Lin, name: Zhijie Lin, name: Feng Ling, name: Fangfang Liu, name: Gaohong Liu, name: Jiawei Liu, name: Jie Liu, name: Jihao Liu, name: Shouda Liu, name: Shu Liu, name: Sichao Liu, name: Songwei Liu, name: Xin Liu, name: Xue Liu, name: Yibo Liu, name: Zikun Liu, name: Zuxi Liu, name: Junlin Lyu, name: Lecheng Lyu, name: Qian Lyu, name: Han Mu, name: Xiaonan Nie, name: Jingzhe Ning, name: Xitong Pan, name: Yanghua Peng, name: Lianke Qin, name: Xueqiong Qu, name: Yuxi Ren, name: Kai Shen, name: Guang Shi, name: Lei Shi, name: Yan Song, name: Yinglong Song, name: Fan Sun, name: Li Sun, name: Renfei Sun, name: Yan Sun, name: Zeyu Sun, name: Wenjing Tang, name: Yaxue Tang, name: Zirui Tao, name: Feng Wang, name: Furui Wang, name: Jinran Wang, name: Junkai Wang, name: Ke Wang, name: Kexin Wang, name: Qingyi Wang, name: Rui Wang, name: Sen Wang, name: Shuai Wang, name: Tingru Wang, name: Weichen Wang, name: Xin Wang, name: Yanhui Wang, name: Yue Wang, name: Yuping Wang, name: Yuxuan Wang, name: Ziyu Wang, name: Guoqiang Wei, name: Wanru Wei, name: Di Wu, name: Guohong Wu, name: Hanjie Wu, name: Jian Wu, name: Jie Wu, name: Ruolan Wu, name: Xinglong Wu, name: Yonghui Wu, name: Ruiqi Xia, name: Liang Xiang, name: Fei Xiao, name: XueFeng Xiao, name: Pan Xie, name: Shuangyi Xie, name: Shuang Xu, name: Jinlan Xue, name: Shen Yan, name: Bangbang Yang, name: Ceyuan Yang, name: Jiaqi Yang, name: Runkai Yang, name: Tao Yang, name: Yang Yang, name: Yihang Yang, name: ZhiXian Yang, name: Ziyan Yang, name: Songting Yao, name: Yifan Yao, name: Zilyu Ye, name: Bowen Yu, name: Jian Yu, name: Chujie Yuan, name: Linxiao Yuan, name: Sichun Zeng, name: Weihong Zeng, name: Xuejiao Zeng, name: Yan Zeng, name: Chuntao Zhang, name: Heng Zhang, name: Jingjie Zhang, name: Kuo Zhang, name: Liang Zhang, name: Liying Zhang, name: Manlin Zhang, name: Ting Zhang, name: Weida Zhang, name: Xiaohe Zhang, name: Xinyan Zhang, name: Yan Zhang, name: Yuan Zhang, name: Zixiang Zhang, name: Fengxuan Zhao, name: Huating Zhao, name: Yang Zhao, name: Hao Zheng, name: Jianbin Zheng, name: Xiaozheng Zheng, name: Yangyang Zheng, name: Yijie Zheng, name: Jiexin Zhou, name: Jiahui Zhu, name: Kuan Zhu, name: Shenhan Zhu, name: Wenjia Zhu, name: Benhui Zou, name: Feilong Zuo
Organization: ByteDance Seed

Recent strides in video generation have paved the way for unified audio-visual generation. In this work, we present Seedance 1.5 pro, a foundational model engineered specifically for native, joint audio-video generation. Leveraging a dual-branch Diffusion Transformer architecture, the model integrates a cross-modal joint module with a specialized multi-stage data pipeline, achieving exceptional audio-visual synchronization and superior generation quality. To ensure practical utility, we implement meticulous post-training optimizations, including Supervised Fine-Tuning (SFT) on high-quality datasets and Reinforcement Learning from Human Feedback (RLHF) with multi-dimensional reward models. Furthermore, we introduce an acceleration framework that boosts inference speed by over 10X. Seedance 1.5 pro distinguishes itself through precise multilingual and dialect lip-syncing, dynamic cinematic camera control, and enhanced narrative coherence, positioning it as a robust engine for professional-grade content creation. Seedance 1.5 pro is now accessible on Volcano Engine at https://console.volcengine.com/ark/region:ark+cn-beijing/experience/vision?type=GenVideo.