Posts by Zhenhua Liu
Athena-PRM: Enhancing Multimodal Reasoning with Data-Efficient Process Reward Models
- 12 January 2026
This blog introduces Athena-PRM, a multimodal Process Reward Model (PRM) designed to evaluate the reward score for each step in solving complex reasoning problems. To efficiently generate high-quality process-labeled data, we leverage prediction consistency between weak and strong completers as a criterion for identifying reliable process labels. We also develop two effective strategies to improve the performance of PRMs: ORM initialization and up-sampling for negative data.