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Sathiya Keerthi

2 accepted papers

2025

AlphaPO: Reward Shape Matters for LLM Alignment

ICML 2025poster

Reinforcement Learning with Human Feedback (RLHF) and its variants have made huge strides toward the effective alignment of large language models (LLMs) to follow instructions and reflect human values. More recently, Direct Alignment Algorithms (DAAs) have emerged in which the reward modeling stage…

Cited by 0SourcePDFScholar
2024

A Precise Characterization of SGD Stability Using Loss Surface Geometry

ICLR 2024poster

Stochastic Gradient Descent (SGD) stands as a cornerstone optimization algorithm with proven real-world empirical successes but relatively limited theoretical understanding. Recent research has illuminated a key factor contributing to its practical efficacy: the implicit regularization it instigates…

Cited by 1SourcePDFScholar