At the end of 2025, during a dinner with the model team, Zeng Yan, head of the Seedance model, told her manager that she still wanted to try training a larger model, at least one with 200 billion parameters. Zeng is a young researcher on ByteDance’s Seed team. She joined the company as a campus hire in 2021, and her research has focused on video understanding and generation. “She has always had strong technical judgment,” someone who has worked …
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