← Back to PeopleResearcherXuandong ZhaoResearcher at OpenAILinkedIn@xuandongzhaoXuandong Zhao is a researcher.1Mentions1Articles1OutletsArticlesMost recent firstMentioned InReferenced in coverageNew critic-free training method beats GRPO on hard math benchmarks by 18%arXivpositiveJun 22, 2026“Co-author of VIMPO paper on policy optimization methods for improving LLM mathematical reasoning.”