Qwen/Qwen3.5-397B-A17B

Qwen3.5-397B-A17B is Alibaba’s flagship open-source model — the first in the Qwen3.5 series (released February 16, 2026) and the most capable open-weight model in the family. It is a native multimodal model trained from scratch on trillions of text, image, and video tokens using early fusion across 201 languages. With 397B total parameters and 17B active per token, it outperforms all Qwen3-VL models on vision tasks while matching or exceeding text-only frontiers. The hosted version is called Qwen3.5-Plus.