{
 "schema_version": "1.7.0",
 "id": "x_NXMC-2026-0051",
 "modified": "2026-10-19T02:33:38.839Z",
 "published": "2026-10-18T09:00:52.565Z",
 "summary": "Qwen3.6-35B-A3B-DFlash: structural change at 0ce151d (2026-06-19)",
 "details": "Qwen3.6-35B-A3B-DFlash: EOS changed from 248046 to 248044; anything fine-tuned or served against the old value stops at a different token; layer count 8 to 6, KV heads 4 to 8; derived parameters 1.47B to 1.37B (-100.7M, -0.20 GB of bf16 weights) (2026-06-19).\n\nRepository: https://huggingface.co/z-lab/Qwen3.6-35B-A3B-DFlash. Revisions from 0ce151d016ba8f0f0454d160a81b52ad4588c924 onward carry this change; a pin at 31977fbe13a86e8b961774f773058175676d89b8 or earlier does not.\n\nChanged keys:\n- eos_token_id: 248046 -> 248044 (tokenizer)\n- num_hidden_layers: 8 -> 6 (structural)\n- num_key_value_heads: 4 -> 8 (structural)\n- pad_token_id: 248044 -> unset (tokenizer)\n- rope_scaling: {\"beta_fast\":32,\"beta_slow\":1,\"factor\":64,\"original_max_position_embeddings\":4096,\"rope_type\":\"yarn\",\"type\":\"yarn\"} -> unset (structural)\n- sliding_window: unset -> 4096 (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/z-lab/Qwen3.6-35B-A3B-DFlash",
     "events": [
      {
       "introduced": "0ce151d016ba8f0f0454d160a81b52ad4588c924"
      }
     ]
    }
   ],
   "database_specific": {
    "model": "z-lab/Qwen3.6-35B-A3B-DFlash",
    "previous_revision": "31977fbe13a86e8b961774f773058175676d89b8"
   }
  }
 ],
 "references": [
  {
   "type": "INTRODUCED",
   "url": "https://huggingface.co/z-lab/Qwen3.6-35B-A3B-DFlash/commit/0ce151d016ba8f0f0454d160a81b52ad4588c924"
  },
  {
   "type": "PACKAGE",
   "url": "https://huggingface.co/z-lab/Qwen3.6-35B-A3B-DFlash"
  },
  {
   "type": "WEB",
   "url": "https://www.neurarch.com/changes-feeds/models/z-lab/Qwen3.6-35B-A3B-DFlash.html"
  }
 ],
 "database_specific": {
  "source": "neurarch model change tracker",
  "model": "z-lab/Qwen3.6-35B-A3B-DFlash",
  "kind": "structural",
  "classes": [
   "structural",
   "tokenizer"
  ],
  "changed_keys": [
   {
    "file": "config",
    "key": "eos_token_id",
    "before": 248046,
    "after": 248044,
    "class": "tokenizer"
   },
   {
    "file": "config",
    "key": "num_hidden_layers",
    "before": 8,
    "after": 6,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "num_key_value_heads",
    "before": 4,
    "after": 8,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "pad_token_id",
    "before": 248044,
    "after": null,
    "class": "tokenizer"
   },
   {
    "file": "config",
    "key": "rope_scaling",
    "before": {
     "beta_fast": 32,
     "beta_slow": 1,
     "factor": 64,
     "original_max_position_embeddings": 4096,
     "rope_type": "yarn",
     "type": "yarn"
    },
    "after": null,
    "class": "structural"
   },
   {
    "file": "config",
    "key": "sliding_window",
    "before": null,
    "after": 4096,
    "class": "structural"
   }
  ],
  "impact": {
   "memory": true,
   "serving": true,
   "tokenizer": true,
   "licence": null
  },
  "breaking": true,
  "breaking_rule": "https://www.neurarch.com/changes-feeds/advisories/index.json#breaking_rule",
  "consequence": {
   "params": {
    "before": 1470386688,
    "after": 1369715200
   },
   "weightsGbBf16": {
    "before": 2.941,
    "after": 2.739
   },
   "trainPeakGb": {
    "before": 167.781,
    "after": 155.82
   },
   "fingerprint": {
    "before": "267aeeb5",
    "after": "fee4da1b"
   },
   "context": null,
   "eos": {
    "before": 248046,
    "after": 248044
   },
   "bos": null
  },
  "commit_date": "2026-06-19T20:54:45.000Z",
  "detected_at": "2026-10-18T09:00:52.565Z",
  "detected_by": "backfill",
  "days_since_first_commit": 63,
  "license": "CC-BY-4.0"
 }
}