Hello! I am currently a M.S. student at the Language & AGI Lab at Yonsei University, advised by Prof. Jinyoung Yeo.
My research goal is to build intelligent AI systems that understand world knowledge to provide meaningful assistance to users.
Mainly, I focus on two complementary directions: (1) developing AI agents that understand and act across diverse environments (digital and physical) to assist users through interaction,
and (2) enhancing the knowledge and reasoning capabilities of language models to provide assistance through response generation.
Below are some keywords of my recent research interests:
‡ indicates equal contribution.
Web-Shepherd: Advancing PRMs for Reinforcing Web Agents
Hyungjoo Chae‡, Sunghwan Kim‡, Junhee Cho‡, Seungone Kim, Seungjun Moon, Gyeom Hwangbo, Dongha Lim, Minjin Kim, Yeonjun Hwang, Minju Gwak, Dongwook Choi, Minseok Kang, Gwanhoon Im, ByeongUng Cho, Hyojun Kim, Jun Hee Han, Taeyoon Kwon, Minju Kim, Beong-woo Kwak, Dongjin Kang, Jinyoung Yeo
Neurips 2025 (Spotlight)
Designing Memory-Augmented AR Agents for Spatiotemporal Reasoning in Personalized Task Assistance
Dongwook Choi, Taeyoon Kwon, Dongil Yang, Hyojun Kim, Jinyoung Yeo
XRMemory Workshop, IEEE ISMAR 2025
Rethinking Reward Model Evaluation Through the Lens of Reward Overoptimization
Sunghwan Kim‡, Dongjin Kang‡, Taeyoon Kwon, Hyungjoo Chae, Jungsoo Won, Dongha Lee, Jinyoung Yeo
ACL 2025 (Oral)
Towards Lifelong Dialogue Agents via Timeline-based Memory Management
Kai Tzu-iunn Ong‡, Namyoung Kim‡, Minju Gwak, Hyungjoo Chae,Taeyoon Kwon, Yohan Jo, Seung-won Hwang, Dongha Lee, Jinyoung Yeo
NACCL 2025
COFFEE-GYM: An Environment for Evaluating and Improving Natural Language Feedback on Erroneous Code
Hyungjoo Chae‡, Taeyoon Kwon‡, Seungjun Moon‡, Yongho Song, Dongjin Kang, Kai Tzu-iunn Ong, Beong-woo Kwak, Seonghyeon Bae, Seung-won Hwang, Jinyoung Yeo
EMNLP 2024
Language Models as Compilers: Simulating Pseudocode Execution Improves Algorithmic Reasoning in Language Models
Hyungjoo Chae‡, Yeonghyeon Kim, Seungone Kim, Kai Tzu-iunn Ong, Beong-woo Kwak, Moohyeon Kim, Seonghwan Kim, Taeyoon Kwon, Jiwan Chung, Youngjae Yu, Jinyoung Yeo
EMNLP 2024
Can Large Language Models be Good Emotional Supporter? Mitigating Preference Bias on Emotional Support Conversation
Dongjin Kang‡, Sunghwan Kim‡, Taeyoon Kwon, Seungjun Moon, Hyunsouk Cho, Youngjae Yu, Dongha Lee, Jinyoung Yeo
ACL 2024 (Outstanding Paper Award)
Large Language Models are Clinical Reasoners: Reasoning-Aware Diagnosis Framework with Prompt-Generated Rationales
Taeyoon Kwon‡, Kai Tzu-iunn Ong‡, Dongjin Kang, Seungjun Moon, Jeong Ryong Lee, Dosik Hwang, Yongsik Sim, Beomseok Sohn, Dongha Lee, Jinyoung Yeo
AAAI 2024
Multi-task Deep Learning for Joint Detection of Necrotizing Viral and Non-infectious Retinitis from Common Blood and Serology Test Data
Kai Tzu-iunn Ong‡, Taeyoon Kwon‡, Harok Jang, Min Kim, Christopher Seungkyu Lee, Suk Ho Byeon, Sung Soo Kim, Jinyoung Yeo, Eun Young Choi
IOVS 2024
Dialogue Chain-of-Thought Distillation for Commonsense-aware Conversational Agents
Hyungjoo Chae‡, Yongho Song‡, Kai Tzu-iunn Ong, Taeyoon Kwon, Minjin Kim, Youngjae Yu, Dongha Lee, Dongyeop Kang, Jinyoung Yeo
EMNLP 2023
Embodied Agents Meet Personalization: Exploring Memory Utilization for Personalized Assistance
Taeyoon Kwon‡, Dongwook Choi‡, Sunghwan Kim, Hyojun Kim, Seungjun Moon, Beong-woo Kwak, Kuan-Hao Huang, Jinyoung Yeo
Arxiv preprint.
Web-Shepherd: Advancing PRMs for Reinforcing Web Agents
Hyungjoo Chae‡, Sunghwan Kim‡, Junhee Cho‡, Seungone Kim, Seungjun Moon, Gyeom Hwangbo, Dongha Lim, Minjin Kim, Yeonjun Hwang, Minju Gwak, Dongwook Choi, Minseok Kang, Gwanhoon Im, ByeongUng Cho, Hyojun Kim, Jun Hee Han, Taeyoon Kwon, Minju Kim, Beong-woo Kwak, Dongjin Kang, Jinyoung Yeo
Neurips 2025 (Spotlight)
Designing Memory-Augmented AR Agents for Spatiotemporal Reasoning in Personalized Task Assistance
Dongwook Choi, Taeyoon Kwon, Dongil Yang, Hyojun Kim, Jinyoung Yeo
XRMemory Workshop, IEEE ISMAR 2025
Rethinking Reward Model Evaluation Through the Lens of Reward Overoptimization
Sunghwan Kim‡, Dongjin Kang‡, Taeyoon Kwon, Hyungjoo Chae, Jungsoo Won, Dongha Lee, Jinyoung Yeo
ACL 2025 (Oral)
Towards Lifelong Dialogue Agents via Timeline-based Memory Management
Kai Tzu-iunn Ong‡, Namyoung Kim‡, Minju Gwak, Hyungjoo Chae,Taeyoon Kwon, Yohan Jo, Seung-won Hwang, Dongha Lee, Jinyoung Yeo
NACCL 2025
Evaluating Robustness of Reward Models for Mathematical Reasoning
Sunghwan Kim‡, Dongjin Kang‡, Taeyoon Kwon, Hyungjoo Chae, Jungsoo Won, Dongha Lee, Jinyoung Yeo
Arxiv preprint
Large Language Models Are Self-Taught Reasoners: Enhancing LLM Applications via Tailored Problem-Solving Demonstrations
Kai Tzu-iunn Ong‡, Taeyoon Kwon, Jinyoung Yeo
Arxiv preprint
COFFEE-GYM: An Environment for Evaluating and Improving Natural Language Feedback on Erroneous Code
Hyungjoo Chae‡, Taeyoon Kwon‡, Seungjun Moon‡, Yongho Song, Dongjin Kang, Kai Tzu-iunn Ong, Beong-woo Kwak, Seonghyeon Bae, Seung-won Hwang, Jinyoung Yeo
EMNLP 2024
Language Models as Compilers: Simulating Pseudocode Execution Improves Algorithmic Reasoning in Language Models
Hyungjoo Chae‡, Yeonghyeon Kim, Seungone Kim, Kai Tzu-iunn Ong, Beong-woo Kwak, Moohyeon Kim, Seonghwan Kim, Taeyoon Kwon, Jiwan Chung, Youngjae Yu, Jinyoung Yeo
EMNLP 2024
Can Large Language Models be Good Emotional Supporter? Mitigating Preference Bias on Emotional Support Conversation
Dongjin Kang‡, Sunghwan Kim‡, Taeyoon Kwon, Seungjun Moon, Hyunsouk Cho, Youngjae Yu, Dongha Lee, Jinyoung Yeo
ACL 2024 (Outstanding Paper Award)
Large Language Models are Clinical Reasoners: Reasoning-Aware Diagnosis Framework with Prompt-Generated Rationales
Taeyoon Kwon‡, Kai Tzu-iunn Ong‡, Dongjin Kang, Seungjun Moon, Jeong Ryong Lee, Dosik Hwang, Yongsik Sim, Beomseok Sohn, Dongha Lee, Jinyoung Yeo
AAAI 2024
Coffee: Boost Your Code LLMs by Fixing Bugs with Feedback
Seungjun Moon‡, Yongho Song‡, Hyungjoo Chae‡, Taeyoon Kwon, Dongjin Kang, Kai Tzu-iunn Ong, Seung-won Hwang, Jinyoung Yeo
Arxiv preprint
Multi-task Deep Learning for Joint Detection of Necrotizing Viral and Non-infectious Retinitis from Common Blood and Serology Test Data
Kai Tzu-iunn Ong‡, Taeyoon Kwon‡, Harok Jang, Min Kim, Christopher Seungkyu Lee, Suk Ho Byeon, Sung Soo Kim, Jinyoung Yeo, Eun Young Choi
IOVS 2024
Dialogue Chain-of-Thought Distillation for Commonsense-aware Conversational Agents
Hyungjoo Chae‡, Yongho Song‡, Kai Tzu-iunn Ong, Taeyoon Kwon, Minjin Kim, Youngjae Yu, Dongha Lee, Dongyeop Kang, Jinyoung Yeo
EMNLP 2023