{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2026-0062",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "NVIDIA-Nemotron-3-Nano-4B-BF16: generation-defaults change at b1ac4a3 (2026-03-16)",
 "details": "NVIDIA-Nemotron-3-Nano-4B-BF16: generation defaults changed (temperature unset to 1, top_p unset to 0.95); a call that does not pass these explicitly now generates differently (2026-03-16).\n\nRepository: https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16. Revisions from b1ac4a3f7049cc760ad2e893d95f63174b4af89e onward carry this change; a pin at 63811f6dfe321499ec633ac3c4d394b25de18162 or earlier does not.\n\nChanged keys:\n- generation temperature: unset -> 1 (generation-defaults)\n- generation top_p: unset -> 0.95 (generation-defaults)\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/NVIDIA-Nemotron-3-Nano-4B-BF16",
     "events": [
      {
       "introduced": "b1ac4a3f7049cc760ad2e893d95f63174b4af89e"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
    "previous_revision": "63811f6dfe321499ec633ac3c4d394b25de18162"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16/commit/b1ac4a3f7049cc760ad2e893d95f63174b4af89e"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
  "kind": "generation-defaults",
  "classes": [
   "generation-defaults"
  ],
  "changed_keys": [
   {
    "file": "generation",
    "key": "temperature",
    "before": null,
    "after": 1,
    "class": "generation-defaults"
   },
   {
    "file": "generation",
    "key": "top_p",
    "before": null,
    "after": 0.95,
    "class": "generation-defaults"
   }
  ],
  "impact": {
   "memory": false,
   "serving": true,
   "tokenizer": false,
   "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": "2026-03-16T16:41:07.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 9,
  "license": "CC-BY-4.0"
 }
}