{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2024-0250",
 "modified": "2026-11-05T13:55:31.736Z",
 "published": "2026-11-05T13:29:03.470Z",
 "summary": "moondream2: structural change at 169f11a (2024-04-20)",
 "details": "moondream2: vocab_size changed from unset to 51200; the embedding and output head change shape, so adapters and merges made against the old vocabulary no longer load cleanly; hidden size 2048, MLP width 8192, attention heads 32, layer count 24 declared (each was unset, so the library default for the class applied); context window unset to 2048 tokens (2024-04-20).\n\nRepository: https://huggingface.co/vikhyatk/moondream2. Revisions from 169f11a1f0144ec0da44bb010db64b7fab617f03 onward carry this change; a pin at d8914b8501120c525d79f7cd2040455ee14c44c1 or earlier does not.\n\nChanged keys:\n- hidden_size: unset -> 2048 (structural)\n- intermediate_size: unset -> 8192 (structural)\n- max_position_embeddings: unset -> 2048 (structural)\n- num_attention_heads: unset -> 32 (structural)\n- num_hidden_layers: unset -> 24 (structural)\n- rope_theta: unset -> 10000 (structural)\n- tie_word_embeddings: unset -> false (structural)\n- vocab_size: unset -> 51200 (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/vikhyatk/moondream2",
     "events": [
      {
       "introduced": "169f11a1f0144ec0da44bb010db64b7fab617f03"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "vikhyatk/moondream2",
    "previous_revision": "d8914b8501120c525d79f7cd2040455ee14c44c1"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/vikhyatk/moondream2/commit/169f11a1f0144ec0da44bb010db64b7fab617f03"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/vikhyatk/moondream2"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/vikhyatk/moondream2.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "vikhyatk/moondream2",
  "kind": "structural",
  "classes": [
   "structural"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "hidden_size",
    "before": null,
    "after": 2048,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "intermediate_size",
    "before": null,
    "after": 8192,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "max_position_embeddings",
    "before": null,
    "after": 2048,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "num_attention_heads",
    "before": null,
    "after": 32,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "num_hidden_layers",
    "before": null,
    "after": 24,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "rope_theta",
    "before": null,
    "after": 10000,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "tie_word_embeddings",
    "before": null,
    "after": false,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "vocab_size",
    "before": null,
    "after": 51200,
    "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": {
    "before": null,
    "after": 2048
   },
   "eos": null,
   "bos": null
  },
  "commit_date": "2024-04-20T20:22:08.000Z",
  "detected_at": "2026-11-05T13:29:03.470Z",
  "detected_by": "backfill",
  "days_since_first_commit": 47,
  "license": "CC-BY-4.0"
 }
}