{
  "slug": "btl-3-27b",
  "order": 87,
  "name": "BTL-3 (27B)",
  "baseTitle": "BTL-3 27B",
  "company": "Bad Theory Labs",
  "country": "Nigeria",
  "flag": "🇳🇬",
  "date": "2026-07-20",
  "decoderType": "Dense hybrid",
  "attention": "3:1 Gated DeltaNet and Gated Attention",
  "layerMix": "16 gated attention + 48 DeltaNet",
  "scale": "27B base + 934 MB LoRA adapter",
  "totalParams": 27000000000,
  "activeParams": 27000000000,
  "context": "262,144",
  "contextTokens": 262144,
  "license": "Apache License 2.0",
  "kvCacheText": "64 KiB",
  "kvCacheKiB": 64,
  "kvCacheLevel": "Low",
  "summary": "Agent-oriented Qwen3.6-27B derivative that adds a rank-32 LoRA adapter for coding, structured tool use, and long multi-turn execution.",
  "keyDetail": "Retains Qwen3.6-27B's 64-layer hybrid stack while adapting its attention, DeltaNet, and FFN projections through rank-32 LoRA.",
  "image": {
    "full": "https://sebastianraschka.com/llm-architecture-gallery/images/architectures/btl-3-27b.webp",
    "thumb": "https://sebastianraschka.com/llm-architecture-gallery/images/architectures/thumbnails/btl-3-27b.webp",
    "alt": "Figure 1: BTL-3 27B",
    "width": 960,
    "height": 904
  },
  "articleUrl": null,
  "links": [
    {
      "label": "adapter_config.json",
      "href": "https://huggingface.co/badtheorylabs/BTL-3/blob/main/adapter_config.json",
      "title": "badtheorylabs/BTL-3"
    },
    {
      "label": "License",
      "href": "https://huggingface.co/badtheorylabs/BTL-3/blob/main/LICENSE",
      "title": null
    }
  ],
  "concepts": [
    {
      "slug": "hybrid-attention",
      "label": "Hybrid Attention",
      "name": "Hybrid Attention",
      "url": "https://llm-atlas-7or.pages.dev/concepts/hybrid-attention/"
    },
    {
      "slug": "gqa",
      "label": "GQA",
      "name": "Grouped-Query Attention",
      "url": "https://llm-atlas-7or.pages.dev/concepts/gqa/"
    },
    {
      "slug": "gated-attention",
      "label": "Gated Attention",
      "name": "Gated Attention",
      "url": "https://llm-atlas-7or.pages.dev/concepts/gated-attention/"
    },
    {
      "slug": "qk-norm",
      "label": "QK-Norm",
      "name": "QK-Norm",
      "url": "https://llm-atlas-7or.pages.dev/concepts/qk-norm/"
    }
  ],
  "aai": null,
  "sourceUrl": "https://sebastianraschka.com/llm-architecture-gallery/#card-btl-3-27b",
  "family": "hybrid",
  "url": "https://llm-atlas-7or.pages.dev/models/btl-3-27b/",
  "markdownUrl": "https://llm-atlas-7or.pages.dev/models/btl-3-27b.md"
}