Lichang Chen

I am a PhD candidate at the Computer Science Department, University of Maryland, College Park, where I work closely with Dr. Heng Huang, Dr. Tianyi Zhou, and Dr. Tom Goldstein. I obtained my bachelor's degree from Zhejiang University. I can be reached at {bob}{my-last-name}@cs.umd.edu.

My name in Chinese: 陈力畅

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Research Interests

My research interests are in steering the Foundation Models(including Large Large Models and Vision Languge Models) effectively and efficiently. 📚 I’m currently working on multimodal alignment, dynamic evaluations of LLMs, and mitigating hackings in RLHF.📽️ Below is my selected publications.

Experience

Google Deepmind, 2024.9 - present, Foundational Research on Gemini Games.
Google Deepmind, 2024.5 - 2024.8, The evaluation/alignment of Omni-Modality Language Models.
Google Research & Cloud AI Research, 2024.2 - 2024.5, The self-improvement of multimodal LLMs.
NVIDIA ADLR team, 2023.9 - 2024.1, Mitigate hackings in RLHF/More Robust Reward Models
Samsung AI Research, 2023.5 - 2023.8, Data Filter for Instruction Tuning.

Selected Publications

	OPTune: Efficient Online Preference Tuning Lichang Chen, Jiuhai Chen, Chenxi Liu, John Kirchenbauer, Davit Soselio, Chen Zhu, Tom Goldstein, Tianyi Zhou, Heng Huang Arxiv, 2024
	OmnixR: Evaluating Omni-modality Language Models on Reasoning across Modalities Lichang Chen, Hexiang Hu, Pranav Shyam, Ming-Hsuan Yang, Boqing Gong, et al. Google Deepmind, 2024
	From Lists to Emojis: How Format Bias Affects Model Alignment Lichang Chen, Xuanchang Zhang, Wei Xiong, Tianyi Zhou, Heng Huang, Tong Zhang. Arxiv*, 2024
	ODIN: Disentangled Reward Mitigates Hacking in RLHF Lichang Chen, Chen Zhu, Davit Soselio, Tianyi Zhou, Tom Goldstein, Heng Huang, Mohammad Shoeybi, Bryan Catanzaro ICML, 2024.
	InstructZero: Efficient Instruction Optimization for Black-Box Large Language Models Lichang Chen, Jiuhai Chen, Tom Goldstein, Heng Huang, Tianyi Zhou ICML, 2024
	AlpaGasus: Training a Better Alpaca with Fewer Data Lichang Chen, Shiyang Li, Jun Yan, Hai Wang, Kalpa Gunaratna, Vikas Yadav, Zheng Tang, Vijay Srinivasan, Tianyi Zhou, Heng Huang, Hongxia Jin ICLR, 2024
	Advanced PPO finetuning tricks Wei Shen, Jian Hu, Pengyu Zhao, Xiaonan He, Lichang Chen (Last Author) Blogs, 2024
	Backdooring Instruction-Tuned Large Language Models with Virtual Prompt Injection Jun Yan, Vikas Yadav, Shiyang Li, Lichang Chen, Zheng Tang, Hai Wang, Vijay Srinivasan, Xiang Ren, Hongxia Jin NAACL , 2024
	HallusionBench: an image-context reasoning benchmark challenging for multi-modality models Fuxiao Liu, Tianrui Guan, Zongxia Li, Lichang Chen, et al. CVPR, 2024
	How Many Demonstrations Do You Need for In-context Learning? Jiuhai Chen, Lichang Chen, Chen Zhu, Tianyi Zhou EMNLP, 2023
	PTP: Boosting Stability and Performance of Prompt Tuning with Perturbation-Based Regularizer Lichang Chen, Jiuhai Chen, Heng Huang, Minhao Cheng EMNLP, 2023