{
  "slug": "qwen3-5-397b",
  "order": 46,
  "name": "Qwen3.5 (397B)",
  "baseTitle": "Qwen3.5 397B",
  "company": "Alibaba Cloud",
  "country": "China",
  "flag": "🇨🇳",
  "date": "2026-02-16",
  "decoderType": "Sparse hybrid",
  "attention": "3:1 Gated DeltaNet and Gated Attention",
  "layerMix": "15 gated attention + 45 DeltaNet",
  "scale": "397B total, 17B active (4.3% active)",
  "totalParams": 397000000000,
  "activeParams": 17000000000,
  "context": "262,144",
  "contextTokens": 262144,
  "license": "Apache License 2.0",
  "kvCacheText": "30 KiB",
  "kvCacheKiB": 30,
  "kvCacheLevel": "Low",
  "summary": "Mainline Qwen refresh that brings the Next-style hybrid attention into the flagship series.",
  "keyDetail": "Turns the former Qwen3-Next side branch into the new core design with 512 experts and 17B active parameters.",
  "image": {
    "full": "https://sebastianraschka.com/llm-architecture-gallery/images/architectures/qwen3-5-397b.webp",
    "thumb": "https://sebastianraschka.com/llm-architecture-gallery/images/architectures/thumbnails/qwen3-5-397b.webp",
    "alt": "Figure 31: Qwen3.5 397B",
    "width": 960,
    "height": 904
  },
  "articleUrl": "https://magazine.sebastianraschka.com/p/a-dream-of-spring-for-open-weight#%C2%A78-qwen35-and-the-continuation-of-hybrid-attention",
  "links": [
    {
      "label": "View in article",
      "href": "https://magazine.sebastianraschka.com/p/a-dream-of-spring-for-open-weight#%C2%A78-qwen35-and-the-continuation-of-hybrid-attention",
      "title": null
    },
    {
      "label": "From scratch",
      "href": "https://github.com/rasbt/LLMs-from-scratch/tree/main/ch05/16_qwen3.5",
      "title": null
    },
    {
      "label": "config.json",
      "href": "https://huggingface.co/Qwen/Qwen3.5-397B-A17B/blob/main/config.json",
      "title": "Qwen/Qwen3.5-397B-A17B"
    },
    {
      "label": "License",
      "href": "https://huggingface.co/Qwen/Qwen3.5-397B-A17B/blob/main/LICENSE",
      "title": null
    }
  ],
  "concepts": [
    {
      "slug": "moe",
      "label": "MoE",
      "name": "Mixture of Experts",
      "url": "https://llm-atlas-7or.pages.dev/concepts/moe/"
    },
    {
      "slug": "gated-attention",
      "label": "Gated Attention",
      "name": "Gated Attention",
      "url": "https://llm-atlas-7or.pages.dev/concepts/gated-attention/"
    },
    {
      "slug": "hybrid-attention",
      "label": "Hybrid Attention",
      "name": "Hybrid Attention",
      "url": "https://llm-atlas-7or.pages.dev/concepts/hybrid-attention/"
    }
  ],
  "aai": {
    "v4": {
      "label": "AA Intelligence Index v4.3.2",
      "total": 21.4,
      "profile": {
        "Scientific": 10.3
      },
      "url": "https://artificialanalysis.ai/models/qwen3-5-397b-a17b-non-reasoning"
    }
  },
  "sourceUrl": "https://sebastianraschka.com/llm-architecture-gallery/#card-qwen3-5-397b",
  "family": "hybrid-moe",
  "url": "https://llm-atlas-7or.pages.dev/models/qwen3-5-397b/",
  "markdownUrl": "https://llm-atlas-7or.pages.dev/models/qwen3-5-397b.md"
}