ByteDance is the Beijing-based owner of TikTok and Douyin; its Seed team is the research arm this corpus tracks. It enters with Seed-Prover 1.5 solving 11 of 12 Putnam problems via agentic reinforcement learning, and returns with in-place test-time training, a model rewriting its own fast weights in flight, and the Seedance video models.
Organization
ByteDance
TikTok's parent, whose Seed research group ships math provers, video models and test-time-training work.
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- Welcome to December 20, 2025 (theinnermostloop.substack.com)
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