ORPO: Monolithic Preference Optimization without Reference Model Jiwoo Hong author Noah Lee author James Thorne author 2024-11 text Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing Yaser Al-Onaizan editor Mohit Bansal editor Yun-Nung Chen editor Association for Computational Linguistics Miami, Florida, USA conference publication hong-etal-2024-orpo 10.18653/v1/2024.emnlp-main.626 https://aclanthology.org/2024.emnlp-main.626/ 2024-11 11170 11189