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Weilin Liu

2 accepted papers

2024

Is DPO Superior to PPO for LLM Alignment? A Comprehensive Study

ICML 2024oral

Reinforcement Learning from Human Feedback (RLHF) is currently the most widely used method to align large language models (LLMs) with human preferences. Existing RLHF methods can be roughly categorized as either reward-based or reward-free. Novel applications such as ChatGPT and Claude leverage rewa…

2023

Learning Zero-Shot Cooperation with Humans, Assuming Humans Are Biased

ICLR 2023poster

There is a recent trend of applying multi-agent reinforcement learning (MARL) to train an agent that can cooperate with humans in a zero-shot fashion without using any human data. The typical workflow is to first repeatedly run self-play (SP) to build a policy pool and then train the final adaptive…