{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2024-0147",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Llama-3.1-405B-FP8: structural change at 60db526 (2024-07-24)",
 "details": "Llama-3.1-405B-FP8: quantization_config changed; the stored format of the weights is different (2024-07-24).\n\nRepository: https://huggingface.co/meta-llama/Llama-3.1-405B-FP8. Revisions from 60db52617fa6b1d8ad96b37f6e6bcc172b6f6846 onward carry this change; a pin at b46ddc84f9bbe25409feac525b16819a05719a02 or earlier does not.\n\nChanged keys:\n- quantization_config: {\"activation_scale_ub\":1200,\"quant_method\":\"fbgemm_fp8\",\"_rest\":\"b3a3f8a22f72af8c\"} -> {\"activation_scale_ub\":1200,\"quant_method\":\"fbgemm_fp8\",\"_rest\":\"bcfb50e1048b00db\"} (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/meta-llama/Llama-3.1-405B-FP8",
     "events": [
      {
       "introduced": "60db52617fa6b1d8ad96b37f6e6bcc172b6f6846"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "meta-llama/Llama-3.1-405B-FP8",
    "previous_revision": "b46ddc84f9bbe25409feac525b16819a05719a02"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/meta-llama/Llama-3.1-405B-FP8/commit/60db52617fa6b1d8ad96b37f6e6bcc172b6f6846"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/meta-llama/Llama-3.1-405B-FP8"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/meta-llama/Llama-3.1-405B-FP8.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "meta-llama/Llama-3.1-405B-FP8",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "quantization_config",
    "before": {
     "activation_scale_ub": 1200,
     "quant_method": "fbgemm_fp8",
     "_rest": "b3a3f8a22f72af8c"
    },
    "after": {
     "activation_scale_ub": 1200,
     "quant_method": "fbgemm_fp8",
     "_rest": "bcfb50e1048b00db"
    },
    "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": "2024-07-24T06:18:07.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 3,
  "license": "CC-BY-4.0"
 }
}