{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2019-0002",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "roberta-base: structural change at 3094fd1 (2019-09-26)",
 "details": "roberta-base: derived parameters 124.0M to 124.0M (+1.5K, +0.00 GB of bf16 weights); context window 512 to 514 tokens (2019-09-26).\n\nRepository: https://huggingface.co/FacebookAI/roberta-base. Revisions from 3094fd15f106304932bbeceb2c40ecd7e82ec6cd onward carry this change; a pin at bbbb96c1319c63786cbe53f5d35e4e857b4a0c95 or earlier does not.\n\nChanged keys:\n- max_position_embeddings: 512 -> 514 (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/FacebookAI/roberta-base",
     "events": [
      {
       "introduced": "3094fd15f106304932bbeceb2c40ecd7e82ec6cd"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "FacebookAI/roberta-base",
    "previous_revision": "bbbb96c1319c63786cbe53f5d35e4e857b4a0c95"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/FacebookAI/roberta-base/commit/3094fd15f106304932bbeceb2c40ecd7e82ec6cd"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/FacebookAI/roberta-base"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/FacebookAI/roberta-base.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "FacebookAI/roberta-base",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "max_position_embeddings",
    "before": 512,
    "after": 514,
    "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": {
    "before": 124032768,
    "after": 124034304
   },
   "weightsGbBf16": {
    "before": 0.248,
    "after": 0.248
   },
   "trainPeakGb": {
    "before": 7.591,
    "after": 7.611
   },
   "fingerprint": null,
   "context": {
    "before": 512,
    "after": 514
   },
   "eos": null,
   "bos": null
  },
  "commit_date": "2019-09-26T17:03:17.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 52,
  "license": "CC-BY-4.0"
 }
}