{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2024-0038",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Llama-3.1-8B-Instruct: template change at b2a4d0f (2024-07-29)",
 "details": "Llama-3.1-8B-Instruct: the chat template changed and renders differently (system+user, multi-turn, tool-call); prompts rendered with the old one no longer match what the model now expects, so cached prompts and eval sets need re-rendering (2024-07-29).\n\nRepository: https://huggingface.co/meta-llama/Llama-3.1-8B-Instruct. Revisions from b2a4d0f33b41fcd59a6d31662cc63b8d53367e1e onward carry this change; a pin at 4281e96c7cf5ab6b312ef0cb78373efa3976a9dd or earlier does not.\n\nChanged keys:\n- tokenizer chat_template_sha256: b48c47f644389271 -> 571eddf08f7eb2ae (template)\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/meta-llama/Llama-3.1-8B-Instruct",
     "events": [
      {
       "introduced": "b2a4d0f33b41fcd59a6d31662cc63b8d53367e1e"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "meta-llama/Llama-3.1-8B-Instruct",
    "previous_revision": "4281e96c7cf5ab6b312ef0cb78373efa3976a9dd"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/meta-llama/Llama-3.1-8B-Instruct/commit/b2a4d0f33b41fcd59a6d31662cc63b8d53367e1e"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/meta-llama/Llama-3.1-8B-Instruct"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/meta-llama/Llama-3.1-8B-Instruct.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "meta-llama/Llama-3.1-8B-Instruct",
  "kind": "template",
  "classes": [
   "template"
  ],
  "changed_keys": [
   {
    "file": "tokenizer",
    "key": "chat_template_sha256",
    "before": "b48c47f644389271",
    "after": "571eddf08f7eb2ae",
    "class": "template"
   }
  ],
  "impact": {
   "memory": false,
   "serving": true,
   "tokenizer": true,
   "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": "2024-07-29T15:53:07.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 11,
  "license": "CC-BY-4.0"
 }
}