Alexander WeiMember of Technical Staff · OpenAIResearcher↗
Researcher
OpenAIResearch Scientist
Brown helped build Libratus and Pluribus, poker systems that mastered strategic play with hidden information, and CICERO, which negotiated with people in Diplomacy. At OpenAI, he became a foundational contributor to o1, applying reinforcement learning and extra test-time computation to reasoning.
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Reviewed August 8, 2026 · Checked for accuracy and new information.