Jonathan GordonResearcher
OpenAI
Research Scientist
via OpenAI
Researcher
Hunter Lightman
HL
Lightman helped make process supervision practical for mathematical reasoning: instead of judging only a final answer, a model learns from feedback on each reasoning step. His work produced the PRM800K dataset and informed OpenAI's broader effort to make advanced reasoning models more reliable.
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Role not listedOpenAI
OpenAIAbout this data
Work and education history is primarily focused on AI-relevant roles and may not be comprehensive.
Last editorial review: August 9, 2026Citation Trend
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