@inproceedings{choi-etal-2026-mentor, title = "{MENTOR}: Reinforcement Learning via Flexible Teacher-Optimized Rewards for Tool-Use Distillation", author = "Choi, ChangSu and Song, Hoyun and Kim, Dongyeon and Cho, Minkyung and Jung, WooHyeon and Park, SunJin and Bae, NohHyeob and Yu, Seona and Lim, KyungTae", editor = "Lee, Hung-Yi and Dev, Sunipa and Li, Jessy and Elliott, Desmond", booktitle = "Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.emnlp-main.1286/", pages = "29289--29319", ISBN = "979-8-89176-459-0" }