LLMilestonesA milestone timeline of AI and large language models

Act VI · The frontier and its limits

Open modelAlibaba

Qwen3.5

Open-sourced a 397B-parameter MoE model that activates only 17B parameters per inference.

397B / 17Btotal / active parameters

Why it matters

Hybrid linear attention makes long-context inference cheaper, and Chinese open models stayed in the top tier.

Built on

MambaQwen3

Source: qwen.ai ↗

Official page not opened for verification; URL taken from citations in multiple reports.

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