Machine Learning Algorithms & Natural Language Processing

Oct 24, 2026 · Artificial Intelligence

ReasoningShield: Why Final Answer Safety Isn't Enough for Chain-of-Thought Models

ReasoningShield introduces the first chain-of-thought safety moderation benchmark with 9.2K samples across 10 risk categories, training 1B/3B models that achieve 91.8% F1 on reasoning traces—outperforming GPT-4o (87.8%) and LlamaGuard-4-12B (56.2%)—while localizing risk evidence to specific reasoning steps.