Qwen3.5 397B A17B
Alibaba · 2026-02-16 · 403.4B parameters
Qwen3.5-397B-A17B is Alibaba's open-weight MoE model in the Qwen3.5 series, released February 16, 2026. Qwen describes its language model as 397B total and 17B activated, while the complete multimodal checkpoint contains 403,397,928,944 parameters; it accepts text, images, and video, uses a hybrid Gated DeltaNet/full-attention architecture, and supports 201 languages and dialects under Apache 2.0. It supports 262,144 tokens natively and documents YaRN extension to 1,010,000 tokens.