{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2025-0120",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "gpt-oss-20b-GGUF: structural change at 5e4ccdf (2025-08-06)",
 "details": "gpt-oss-20b-GGUF: declared dtype unset to \"bfloat16\"; quantization_config changed; the stored format of the weights is different (2025-08-06).\n\nRepository: https://huggingface.co/unsloth/gpt-oss-20b-GGUF. Revisions from 5e4ccdfff3117bf112e08ff7e024ed55447e8e67 onward carry this change; a pin at 4782614e97a6ca8b27ebf9c8916ac15f0a850887 or earlier does not.\n\nChanged keys:\n- dtype: unset -> bfloat16 (metadata)\n- quantization_config: {\"quant_method\":\"mxfp4\",\"_rest\":\"ca7acd1fa0c4a5b3\"} -> unset (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/unsloth/gpt-oss-20b-GGUF",
     "events": [
      {
       "introduced": "5e4ccdfff3117bf112e08ff7e024ed55447e8e67"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "unsloth/gpt-oss-20b-GGUF",
    "previous_revision": "4782614e97a6ca8b27ebf9c8916ac15f0a850887"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/unsloth/gpt-oss-20b-GGUF/commit/5e4ccdfff3117bf112e08ff7e024ed55447e8e67"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/unsloth/gpt-oss-20b-GGUF"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/unsloth/gpt-oss-20b-GGUF.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "unsloth/gpt-oss-20b-GGUF",
  "kind": "structural",
  "classes": [
   "structural",
   "metadata"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "dtype",
    "before": null,
    "after": "bfloat16",
    "class": "metadata"
   },
   {
    "file": "config",
    "key": "quantization_config",
    "before": {
     "quant_method": "mxfp4",
     "_rest": "ca7acd1fa0c4a5b3"
    },
    "after": null,
    "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": "2025-08-06T03:50:16.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 0,
  "license": "CC-BY-4.0"
 }
}