{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2025-0116",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Qwen3-1.7B-Base: template change at 36be17a (2025-04-28)",
 "details": "Qwen3-1.7B-Base: the chat template changed and renders differently (multi-turn, tool-call); prompts rendered with the old one no longer match what the model now expects, so cached prompts and eval sets need re-rendering (2025-04-28).\n\nRepository: https://huggingface.co/Qwen/Qwen3-1.7B-Base. Revisions from 36be17a0ee54955c2d50eb4af5a126b429874a6e onward carry this change; a pin at 658b6ee46470b73f3e0e04e57fc9fb7031fd7daa or earlier does not.\n\nChanged keys:\n- tokenizer chat_template_sha256: 44d5f08f3f72b837 -> 87a2728cb8dc9fe4 (template)\n\nThis record says what the change does mechanically. It is not a report that anything broke for anyone.",
 "affected": [
  {
   "ranges": [
    {
     "type": "GIT",
     "repo": "https://huggingface.co/Qwen/Qwen3-1.7B-Base",
     "events": [
      {
       "introduced": "36be17a0ee54955c2d50eb4af5a126b429874a6e"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "Qwen/Qwen3-1.7B-Base",
    "previous_revision": "658b6ee46470b73f3e0e04e57fc9fb7031fd7daa"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/Qwen/Qwen3-1.7B-Base/commit/36be17a0ee54955c2d50eb4af5a126b429874a6e"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/Qwen/Qwen3-1.7B-Base"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/Qwen/Qwen3-1.7B-Base.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "Qwen/Qwen3-1.7B-Base",
  "kind": "template",
  "classes": [
   "template"
  ],
  "changed_keys": [
   {
    "file": "tokenizer",
    "key": "chat_template_sha256",
    "before": "44d5f08f3f72b837",
    "after": "87a2728cb8dc9fe4",
    "class": "template"
   }
  ],
  "impact": {
   "memory": false,
   "serving": true,
   "tokenizer": true,
   "licence": null
  },
  "breaking": true,
  "breaking_rule": "https://www.neurarch.com/changes-feeds/advisories/index.json#breaking_rule",
  "consequence": {
   "params": null,
   "weightsGbBf16": null,
   "trainPeakGb": null,
   "fingerprint": null,
   "context": null,
   "eos": null,
   "bos": null
  },
  "commit_date": "2025-04-28T17:42:43.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 0,
  "license": "CC-BY-4.0"
 }
}