{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2026-0067",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Gemma-4-26B-A4B-NVFP4: template change at bbf84e0 (2026-05-07)",
 "details": "Gemma-4-26B-A4B-NVFP4: the chat template text changed but rendered byte-identically on the fixed conversation set (system+user, multi-turn, tool call) (2026-05-07).\n\nRepository: https://huggingface.co/nvidia/Gemma-4-26B-A4B-NVFP4. Revisions from bbf84e07ec612504a2ad296b3c7ab2e1712f7ea2 onward carry this change; a pin at b0b91da4467f3038cd01c6448bf497c22d951287 or earlier does not.\n\nChanged keys:\n- tokenizer chat_template_sha256: 85a08664d16d8f3b -> 94899c0f917d93f6 (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/nvidia/Gemma-4-26B-A4B-NVFP4",
     "events": [
      {
       "introduced": "bbf84e07ec612504a2ad296b3c7ab2e1712f7ea2"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "nvidia/Gemma-4-26B-A4B-NVFP4",
    "previous_revision": "b0b91da4467f3038cd01c6448bf497c22d951287"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/nvidia/Gemma-4-26B-A4B-NVFP4/commit/bbf84e07ec612504a2ad296b3c7ab2e1712f7ea2"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/nvidia/Gemma-4-26B-A4B-NVFP4"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/nvidia/Gemma-4-26B-A4B-NVFP4.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "nvidia/Gemma-4-26B-A4B-NVFP4",
  "kind": "template",
  "classes": [
   "template"
  ],
  "changed_keys": [
   {
    "file": "tokenizer",
    "key": "chat_template_sha256",
    "before": "85a08664d16d8f3b",
    "after": "94899c0f917d93f6",
    "class": "template"
   }
  ],
  "impact": {
   "memory": false,
   "serving": true,
   "tokenizer": true,
   "licence": null
  },
  "breaking": false,
  "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": "2026-05-07T00:43:59.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 5,
  "license": "CC-BY-4.0"
 }
}