{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2026-0100",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Kimi-K2.5-NVFP4: structural change at e4e908c (2026-03-04)",
 "details": "Kimi-K2.5-NVFP4: quantization_config changed; the stored format of the weights is different (2026-03-04).\n\nRepository: https://huggingface.co/nvidia/Kimi-K2.5-NVFP4. Revisions from e4e908c073784de20ad3af0be653421f1088922d onward carry this change; a pin at dd47e2388cd35fb37a2ebf03b938b351ae0ffc35 or earlier does not.\n\nChanged keys:\n- quantization_config: {\"quant_algo\":\"NVFP4\",\"quant_method\":\"modelopt\",\"_rest\":\"25548a8a87a6132f\"} -> {\"quant_algo\":\"NVFP4\",\"quant_method\":\"modelopt\",\"_rest\":\"df3d08bba5e8236d\"} (structural)\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/Kimi-K2.5-NVFP4",
     "events": [
      {
       "introduced": "e4e908c073784de20ad3af0be653421f1088922d"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "nvidia/Kimi-K2.5-NVFP4",
    "previous_revision": "dd47e2388cd35fb37a2ebf03b938b351ae0ffc35"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/nvidia/Kimi-K2.5-NVFP4/commit/e4e908c073784de20ad3af0be653421f1088922d"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/nvidia/Kimi-K2.5-NVFP4"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/nvidia/Kimi-K2.5-NVFP4.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "nvidia/Kimi-K2.5-NVFP4",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "quantization_config",
    "before": {
     "quant_algo": "NVFP4",
     "quant_method": "modelopt",
     "_rest": "25548a8a87a6132f"
    },
    "after": {
     "quant_algo": "NVFP4",
     "quant_method": "modelopt",
     "_rest": "df3d08bba5e8236d"
    },
    "class": "structural"
   }
  ],
  "impact": {
   "memory": true,
   "serving": true,
   "tokenizer": false,
   "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": "2026-03-04T18:11:13.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 32,
  "license": "CC-BY-4.0"
 }
}