Doubao Seed 2.0 / 2.1

Doubao Seed 2.0 / 2.1 is ByteDance's coming-soon flagship. The listed size is 3.2T total parameters with about 280B active, and a 1M context window on the card. The Pro tier's native window is 256K. The verified score on record is 89.5% Video-MME, the highest video score in this catalog, plus strong visual-math and competition-math results reported ahead of launch. It is not callable yet. Until it is, long-video work has no live substitute here, and repository coding should stay on DeepSeek or Qwen 3.8 Max.