← Back to PeopleAFResearcherAosong FengResearcher at Amazon Web Services (AWS)LinkedInResearcher at Amazon Web Services.1Mentions1Articles1OutletsArticlesMost recent firstMentioned InReferenced in coverageNew critic-free training method beats GRPO on hard math benchmarks by 18%arXivpositiveJun 22, 2026“Co-author of research on value-implicit policy optimization for improving LLM reasoning on math benchmarks.”