Research

Research

We study AI systems that learn from experience, reason in language, and stay both efficient and responsible under real constraints.

BREATHE AI Lab's central question is how language models can move beyond static prediction toward systems that improve through interaction with tools and feedback, stay efficient enough to deploy at scale, and earn trust through evidence rather than impression.

Self-evolving AI

Models and agents that adapt from feedback, trajectories, tool use, and experience.

Language agents

Systems that plan, use tools, collaborate, and complete long-horizon tasks.

Efficient language models

Compact models that remain capable, controllable, and useful under deployment constraints.

Responsible evaluation

Measurements that expose capability, robustness, failure modes, and usefulness.

Sep 2025 ICLR 2026

Difficulty-Diversity Collaborative Filtering for Data-Efficient LLM Fine-Tuning

LP Hoang, W Zhang, W Lu

Data-efficient fine-tuning work that selects training signals by coordinating example difficulty and diversity for large language models.

Oct 2025 ICLR 2026

PEAR: Phase Entropy Aware Reward for Efficient Reasoning

C Huang, W Lu, W Zhang

Phase-aware reward design for reducing unnecessary reasoning length while preserving strong performance across reasoning benchmarks.

Jun 2025 EMNLP 2025

Through the Valley: Path to Effective Long CoT Training for Small Language Models

R Luo, J Li, C Huang, W Lu

Analysis and training guidance for long chain-of-thought supervision in small language models, including when long CoT can degrade performance.

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