CORTEXA
← Browse

Berkcan Kapusuzoglu

2 papers indexed

arxivcs.CLcs.AI2026-07-11

Structured Thoughts For Improved Reasoning And Context Pruning

Zain Sarwar, Supriyo Chakraborty, Berkcan Kapusuzoglu, Chia-Hsuan Lee, Anirban Das, Stephen Rawls, et al.

Large language models (LLMs) excel at generating long chains of thought, but long reasoning traces are often verbose and memory-inefficient. In this work, we introduce Structured Thoughts, a framework that organizes reasoning into alternating <try> and <outcome> blocks: <try> cap…

View free PDFSource page
arxivcs.LG2026-06-28

On the Policy Gradient Foundations of Group Relative Policy Optimization: Credit Assignment, Gradient Sparsity, and Rank Collapse

Amritansh Mishra, Supriyo Chakraborty, Berkcan Kapusuzoglu

Group Relative Policy Optimization (GRPO) eliminates the learned critic in PPO by using the mean reward of grouped rollouts as a baseline. We provide a rigorous derivation of GRPO from first principles of the policy gradient theorem, revealing a fundamental credit assignment fail…

View free PDFSource page