{
 "product": "YFarmX Model Identity",
 "method": "tokenizer fingerprinting v1-50",
 "updated": "2026-08-22",
 "record_url": "https://yfarmx.com/ai/models/z-ai/glm-5.3/",
 "citation": "YFarmX Model Identity: Z.ai: GLM 5.3 (z-ai/glm-5.3) evidence record. Measured 2026-08-21. https://yfarmx.com/ai/models/z-ai/glm-5.3/",
 "record": {
  "id": "z-ai/glm-5.3",
  "slug": "z-ai/glm-5.3",
  "name": "Z.ai: GLM 5.3",
  "lab": "Z.ai",
  "alias": false,
  "variant_of": null,
  "created": 1787086655,
  "new_since_20_aug": false,
  "description": "GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...",
  "declared": {
   "tokenizer": "Other",
   "modality": "text->text",
   "input": [
    "text"
   ],
   "context": 1048576,
   "max_output": 131072,
   "pricing": {
    "prompt": "0.0000014",
    "completion": "0.0000044"
   },
   "params": [
    "include_reasoning",
    "max_tokens",
    "reasoning",
    "reasoning_effort",
    "response_format",
    "temperature",
    "tool_choice",
    "tools",
    "top_k",
    "top_p"
   ],
   "defaults": {
    "temperature": 1,
    "top_p": 0.95
   },
   "reasoning": {
    "mandatory": true,
    "default_enabled": true,
    "supported_efforts": [
     "max",
     "high",
     "low"
    ],
    "default_effort": "max"
   },
   "hugging_face": null
  },
  "measurement": {
   "status": "measured",
   "at": "2026-08-21",
   "run": "catalogue-sweep",
   "overhead": 12,
   "providers": [
    "Z.AI"
   ],
   "clean_rows": 50,
   "corrupt_rows": 0,
   "signature": "tk_133b086c",
   "counts": {
    "en-prose": 14,
    "en-long": 16,
    "spaces-20": 3,
    "spaces-60": 3,
    "tabs-20": 3,
    "newlines-20": 4,
    "mixed-ws": 5,
    "digits-9": 5,
    "digits-12": 7,
    "digits-30": 10,
    "digits-sep": 9,
    "float-long": 14,
    "zh-common": 9,
    "zh-long": 10,
    "zh-rare": 18,
    "ja-kana": 10,
    "ja-kanji": 14,
    "ko": 17,
    "ru": 13,
    "ar": 13,
    "he": 24,
    "hi": 27,
    "th": 24,
    "el": 14,
    "emoji-basic": 5,
    "emoji-skin": 10,
    "emoji-zwj-family": 7,
    "emoji-zwj-x3": 21,
    "emoji-flags": 24,
    "emoji-prof": 15,
    "math": 27,
    "boxdraw": 28,
    "combining": 10,
    "cjk-ext-b": 13,
    "surrogates": 40,
    "zalgo": 22,
    "rtl-mix": 8,
    "py-code": 25,
    "py-indent": 15,
    "json": 21,
    "html": 16,
    "regex": 44,
    "camel": 5,
    "snake": 6,
    "rare-word-x5": 31,
    "repeat-tok": 22,
    "base64": 35,
    "hex": 14,
    "url": 17,
    "uuid": 28
   },
   "corrupt": {},
   "observations": [
    {
     "at": "2026-08-20",
     "run": "ox-alpha-investigation",
     "clean": 50
    },
    {
     "at": "2026-08-21",
     "run": "catalogue-sweep",
     "clean": 50
    }
   ]
  },
  "note": null,
  "api_signature": "api_7e146681",
  "api_matches": [
   "stealth/ox-alpha",
   "~z-ai/glm-latest"
  ],
  "identity": {
   "kind": "lineage",
   "family": "Z.ai",
   "confidence": "very-high",
   "confidence_reason": "an exact fingerprint shared with 2 models and an identical API contract inside the same group: two signals of different kinds agree",
   "basis": [
    "exact tokenizer signature shared with 2 models",
    "API-surface contract identical to a group member"
   ],
   "contradiction": null,
   "declared_vs_measured": "resolved"
  },
  "comparator": "z-ai/glm-4.7-flash",
  "neighbours": [
   {
    "id": "stealth/ox-alpha",
    "same": 50,
    "total": 50
   },
   {
    "id": "z-ai/glm-4.7-flash",
    "same": 50,
    "total": 50
   },
   {
    "id": "z-ai/glm-5.2",
    "same": 49,
    "total": 50
   },
   {
    "id": "z-ai/glm-4.6v",
    "same": 40,
    "total": 50
   },
   {
    "id": "z-ai/glm-4.5-air",
    "same": 40,
    "total": 50
   },
   {
    "id": "meta-llama/llama-3.2-1b-instruct",
    "same": 24,
    "total": 50
   }
  ]
 }
}