{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2026-0042",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16: template change at 23d21ac (2026-04-21)",
 "details": "Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16: the chat template changed and renders differently (system+user, 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 (2026-04-21).\n\nRepository: https://huggingface.co/nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16. Revisions from 23d21acd455d9836d50c48570a329bde77e08ba4 onward carry this change; a pin at eb24a90335903c7b16951954976ef53715d1fc79 or earlier does not.\n\nChanged keys:\n- tokenizer chat_template_sha256: 5bf09630a205d95b -> 41428e0c65e312c3 (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/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16",
     "events": [
      {
       "introduced": "23d21acd455d9836d50c48570a329bde77e08ba4"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16",
    "previous_revision": "eb24a90335903c7b16951954976ef53715d1fc79"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16/commit/23d21acd455d9836d50c48570a329bde77e08ba4"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "nvidia/Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF16",
  "kind": "template",
  "classes": [
   "template"
  ],
  "changed_keys": [
   {
    "file": "tokenizer",
    "key": "chat_template_sha256",
    "before": "5bf09630a205d95b",
    "after": "41428e0c65e312c3",
    "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": "2026-04-21T15:38:18.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 1,
  "license": "CC-BY-4.0"
 }
}