Tianyi Wang, Yixia Li, Long Li, Yibiao Chen, Shaohan Huang, Yun Chen 0007, Peng Li 0030, Yang Liu 0005, Guanhua Chen 0001. SPPO: Sequence-Level PPO for Long-Horizon Reasoning Tasks. In Maria Liakata, Viviane P. Moreira, Jiajun Zhang 0001, David Jurgens, editors, Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), ACL 2026, San Diego, California, United States, July 2-7, 2026. pages 7831-7853, Association for Computational Linguistics, 2026. [doi]
Abstract is missing.