OneRec-V2 Technical Report
Abstract
Recent breakthroughs in generative AI have transformed recommender systems through end-to-end generation. OneRec reformulates recommendation as an autoregressive generation task, achieving high Model FLOPs Utilization. While OneRec-V1 has shown significant empirical success in real-world deployment, two critical challenges hinder its scalability and performance: (1) inefficient computational allocation where 97.66% of resources are consumed by sequence encoding rather than generation, and (2) limitations in reinforcement learning relying solely on reward models. To address these challenges, we propose OneRec-V2, featuring: (1) Lazy Decoder-Only Architecture: Eliminates encoder bottlenecks, reducing total computation by 94% and training resources by 90%, enabling successful scaling to 8B parameters. (2) Preference Alignment with Real-World User Interactions: Incorporates Duration-Aware Reward Shaping and Adaptive Ratio Clipping to better align with user preferences using real-world feedback. Extensive A/B tests on Kuaishou demonstrate OneRec-V2's effectiveness, improving App Stay Time by 0.467%/0.741% while balancing multi-objective recommendations. This work advances generative recommendation scalability and alignment with real-world feedback, representing a step forward in the development of end-to-end recommender systems.
Keywords
Cite
@article{arxiv.2508.20900,
title = {OneRec-V2 Technical Report},
author = {Guorui Zhou and Hengrui Hu and Hongtao Cheng and Huanjie Wang and Jiaxin Deng and Jinghao Zhang and Kuo Cai and Lejian Ren and Lu Ren and Liao Yu and Pengfei Zheng and Qiang Luo and Qianqian Wang and Qigen Hu and Rui Huang and Ruiming Tang and Shiyao Wang and Shujie Yang and Tao Wu and Wuchao Li and Xinchen Luo and Xingmei Wang and Yi Su and Yunfan Wu and Zexuan Cheng and Zhanyu Liu and Zixing Zhang and Bin Zhang and Boxuan Wang and Chaoyi Ma and Chengru Song and Chenhui Wang and Chenglong Chu and Di Wang and Dongxue Meng and Dunju Zang and Fan Yang and Fangyu Zhang and Feng Jiang and Fuxing Zhang and Gang Wang and Guowang Zhang and Han Li and Honghui Bao and Hongyang Cao and Jiaming Huang and Jiapeng Chen and Jiaqiang Liu and Jinghui Jia and Kun Gai and Lantao Hu and Liang Zeng and Qiang Wang and Qidong Zhou and Rongzhou Zhang and Shengzhe Wang and Shihui He and Shuang Yang and Siyang Mao and Sui Huang and Tiantian He and Tingting Gao and Wei Yuan and Xiao Liang and Xiaoxiao Xu and Xugang Liu and Yan Wang and Yang Zhou and Yi Wang and Yiwu Liu and Yue Song and Yufei Zhang and Yunfeng Zhao and Zhixin Ling and Ziming Li},
journal= {arXiv preprint arXiv:2508.20900},
year = {2025}
}