SofT-GRPO: How Gumbel-Softmax Revolutionizes LLM Reinforcement Learning

SofT-GRPO: Revolutionizing LLM Reinforcement Learning with Soft-Thinking Policy Optimization Core Question Answered This article explains how SofT-GRPO solves the fundamental challenge of applying reinforcement learning to soft-thinking LLMs, achieving superior performance over discrete-token methods through innovative Gumbel noise injection and reparameterization techniques. Introduction: The Bottleneck of Traditional Discrete-Token Reasoning Large language models have transformed reasoning capabilities across diverse domains, yet most existing methods remain constrained by discrete token selection. This limitation manifests in two critical ways: first, it restricts the model’s ability to represent abstract concepts that cannot be easily captured by single tokens; second, it forces sequential reasoning that …