Papers with token-level reward model
Fine-Grained Reward Optimization for Machine Translation using Error Severity Mappings (2026.tacl-1)
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Miguel Moura Ramos, Tomás Almeida, Daniel Vareta, Filipe Azevedo, Sweta Agrawal, Patrick Fernandes, André F. T. Martins
| Challenge: | Reinforcement learning (RL) is an effective and robust method for training neural machine translation systems. |
| Approach: | They propose a method that leverages fine-grained, token-level quality assessments . they use a state-of-the-art quality estimation system as their token- level reward model . |
| Outcome: | The proposed approach leverages fine-grained, token-level quality assessments along with error severity levels to improve translation quality. |
Aligning Large Language Models via Fine-grained Supervision (2024.acl-short)
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| Challenge: | Pre-trained large-scale language models often generate biased or toxic text, misaligning with human intentions. |
| Approach: | They propose to use human feedback to improve LLM alignment by fine-grained token supervision . they ask annotators to edit less preferred responses to make them more favorable . |
| Outcome: | The proposed method improves LLM alignment by up to 5.1% in terms of win rate compared with the traditional model. |
Token-level Proximal Policy Optimization for Query Generation (2025.emnlp-main)
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Yichen Ouyang, Lu Wang, Fangkai Yang, Pu Zhao, Chenghua Huang, Jianfeng Liu, Bochen Pang, Yaming Yang, Yuefeng Zhan, Hao Sun, Qingwei Lin, Saravan Rajmohan, Weiwei Deng, Dongmei Zhang, Feng Sun
| Challenge: | Large Language Models (LLMs) have improved search engines and recommendation systems through their text understanding capabilities. |
| Approach: | They propose a token-level proximal policy optimization approach to empower LLMs to perform better in query generation through fine-tuning. |
| Outcome: | The proposed approach outperforms existing LLMs on an open-source and industrial dataset. |