{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2022-0007",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "opt-125m: structural change at fae5403 (2022-05-17)",
 "details": "opt-125m: architectures [\"OPTForCausalLM\"] to [\"OPTModel\"]; a different class is instantiated from the same id (2022-05-17).\n\nRepository: https://huggingface.co/facebook/opt-125m. Revisions from fae54032a2fff2773ba4f20b5263271c3c5eefab onward carry this change; a pin at 74b53f9dd2c95e3338047711b9b30daa8bcb9525 or earlier does not.\n\nChanged keys:\n- architectures: [\"OPTForCausalLM\"] -> [\"OPTModel\"] (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/facebook/opt-125m",
     "events": [
      {
       "introduced": "fae54032a2fff2773ba4f20b5263271c3c5eefab"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "facebook/opt-125m",
    "previous_revision": "74b53f9dd2c95e3338047711b9b30daa8bcb9525"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/facebook/opt-125m/commit/fae54032a2fff2773ba4f20b5263271c3c5eefab"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/facebook/opt-125m"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/facebook/opt-125m.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "facebook/opt-125m",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "architectures",
    "before": [
     "OPTForCausalLM"
    ],
    "after": [
     "OPTModel"
    ],
    "class": "structural"
   }
  ],
  "impact": {
   "memory": false,
   "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": "2022-05-17T14:58:09.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 5,
  "license": "CC-BY-4.0"
 }
}