04:00
2026-08-11
machinebrief.com
artificial-intelligence
Quality-Diversity Stress Tests for Process Reward Models:What Archive Coverage Can and Cannot Certify
A new arXiv study (2608.08008v1) proposes quality-diversity stress testing for process reward models (PRMs) using MAP-Elites, revealing that Qwen2.5-Math-PRM-7B exhibits an aggregation-dependent vulne…