← Search

Josef Dai

10 accepted papers

2025

InterMT: Multi-Turn Interleaved Preference Alignment with Human Feedback

NeurIPS 2025spotlight

As multimodal large models (MLLMs) continue to advance across challenging tasks, a key question emerges: \textbf{\textit{What essential capabilities are still missing? }} A critical aspect of human learning is continuous interaction with the environment -- not limited to language, but also involving…

Cited by 0SourceScholar
2025

Language Models Resist Alignment: Evidence From Data Compression

ACL 2025long

Large language models (LLMs) may exhibit unintended or undesirable behaviors. Recent works have concentrated on aligning LLMs to mitigate harmful outputs. Despite these efforts, some anomalies indicate that even a well-conducted alignment process can be easily circumvented, whether intentionally or…

2025

PKU-SafeRLHF: Towards Multi-Level Safety Alignment for LLMs with Human Preference

ACL 2025long

In this work, we introduce the PKU-SafeRLHF dataset, designed to promote research on safety alignment in large language models (LLMs). As a sibling project to SafeRLHF and BeaverTails, we separate annotations of helpfulness and harmlessness for question-answering pairs, providing distinct perspectiv…

2025

Reward Generalization in RLHF: A Topological Perspective

ACL 2025finding

Existing alignment methods share a common topology of information flow, where reward information is collected from humans, modeled with preference learning, and used to tune language models. However, this shared topology has not been systematically characterized, nor have its alternatives been thoro…

Cited by 0SourcePDFScholar
2025

SafeLawBench: Towards Safe Alignment of Large Language Models

ACL 2025finding

With the growing prevalence of large language models (LLMs), the safety of LLMs has raised significant concerns. However, there is still a lack of definitive standards for evaluating their safety due to the subjective nature of current safety benchmarks. To address this gap, we conducted the first e…

2025

SafeVLA: Towards Safety Alignment of Vision-Language-Action Model via Constrained Learning

NeurIPS 2025spotlight

Vision-language-action models (VLAs) show potential as generalist robot policies. However, these models pose extreme safety challenges during real-world deployment, including the risk of harm to the environment, the robot itself, and humans. *How can safety constraints be explicitly integrated into…

Cited by 0SourceScholar
2025

Sequence to Sequence Reward Modeling: Improving RLHF by Language Feedback

AAAI 2025technical

Aligning the behavior of Large language models (LLMs) with human intentions and values remains a critical challenge. Reinforcement learning from human feedback (RLHF) aligns LLMs by training a reward model (RM) on human preferences and fine-tuning the LLMs to maximize RM feedback. Despite its effect…

Cited by 4SourcePDFScholar
2024

Safe RLHF: Safe Reinforcement Learning from Human Feedback

ICLR 2024spotlight

With the development of large language models (LLMs), striking a balance between the performance and safety of AI systems has never been more critical. However, the inherent tension between the objectives of helpfulness and harmlessness presents a significant challenge during LLM training. To addres…

2024

SafeSora: Towards Safety Alignment of Text2Video Generation via a Human Preference Dataset

NeurIPS 2024poster

To mitigate the risk of harmful outputs from large vision models (LVMs), we introduce the *SafeSora* dataset to promote research on aligning text-to-video generation with human values. This dataset encompasses human preferences in text-to-video generation tasks along two primary dimensions: helpfuln…

2023

Safety Gymnasium: A Unified Safe Reinforcement Learning Benchmark

NeurIPS 2023poster

Artificial intelligence (AI) systems possess significant potential to drive societal progress. However, their deployment often faces obstacles due to substantial safety concerns. Safe reinforcement learning (SafeRL) emerges as a solution to optimize policies while simultaneously adhering to multiple…

Cited by 73SourcePDFScholar