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Leitian Tao

7 accepted papers

2026

Hybrid Reinforcement: when reward is sparse, better to be dense

ICLR 2026poster

Post-training for reasoning in large language models has increasingly relied on verifiable rewards: deterministic checkers that provide $0$–$1$ correctness signals. While reliable, such binary feedback is brittle—many tasks admit partially correct or alternative answers that verifiers under-credit,…

Cited by 0SourceScholar
2026

RESTRAIN: From Spurious Votes to Signals — Self-Training RL with Self-Penalization

ICLR 2026poster

Reinforcement learning with human-annotated data has boosted chain-of-thought reasoning in large reasoning models, but these gains come at high costs in labeled data while faltering on harder tasks. A natural next step is experience-driven learning, where models improve without curated labels by ada…

Cited by 0SourceScholar
2025

Limited Preference Data? Learning Better Reward Model with Latent Space Synthesis

NeurIPS 2025poster

Reward modeling, crucial for aligning large language models (LLMs) with human preferences, is often bottlenecked by the high cost of preference data. Existing textual data synthesis methods are computationally expensive. We propose a novel framework LENS for synthesizing preference data directly in…

Cited by 0SourcecodeScholar
2025

Position: Challenges and Future Directions of Data-Centric AI Alignment

ICML 2025poster

As AI systems become increasingly capable and influential, ensuring their alignment with human values, preferences, and goals has become a critical research focus. Current alignment methods primarily focus on designing algorithms and loss functions but often underestimate the crucial role of data. T…

Cited by 0SourcePDFScholar
2023

Activate and Reject: Towards Safe Domain Generalization under Category Shift

ICCV 2023poster

Albeit the notable performance on in-domain test points, it is non-trivial for deep neural networks to attain satisfactory accuracy when deploying in the open world, where novel domains and object classes often occur. In this paper, we study a practical problem of Domain Generalization under Categor…

Cited by 8PDFScholar