
Mo BavarianResearcher
OpenAI
Member of Technical Staff
via OpenAI
Researcher · Engineer
Member of Technical Staff at OpenAI
Winter co-authored the GPT-3 paper, co-led GPT-4's long-context work, and served as an architecture lead for GPT-4o. His work spans model architecture, pretraining data, long-context research, and reinforcement-learning systems.
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Last editorial review: August 15, 2026