{
 "product": "YFarmX Model Identity",
 "method": "tokenizer fingerprinting v1-50",
 "updated": "2026-08-22",
 "record_url": "https://yfarmx.com/ai/models/anthropic/claude-sonnet-5/",
 "citation": "YFarmX Model Identity: Anthropic: Claude Sonnet 5 (anthropic/claude-sonnet-5) evidence record. https://yfarmx.com/ai/models/anthropic/claude-sonnet-5/",
 "record": {
  "id": "anthropic/claude-sonnet-5",
  "slug": "anthropic/claude-sonnet-5",
  "name": "Anthropic: Claude Sonnet 5",
  "lab": "Anthropic",
  "alias": false,
  "variant_of": null,
  "created": 1782843083,
  "new_since_20_aug": false,
  "description": "Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...",
  "declared": {
   "tokenizer": "Claude",
   "modality": "text+image+file->text",
   "input": [
    "text",
    "image",
    "file"
   ],
   "context": 1000000,
   "max_output": 128000,
   "pricing": {
    "prompt": "0.000002",
    "completion": "0.00001"
   },
   "params": [
    "include_reasoning",
    "max_completion_tokens",
    "max_tokens",
    "reasoning",
    "reasoning_effort",
    "response_format",
    "stop",
    "structured_outputs",
    "tool_choice",
    "tools",
    "verbosity"
   ],
   "defaults": {},
   "reasoning": {
    "mandatory": false,
    "default_enabled": true,
    "supported_efforts": [
     "max",
     "xhigh",
     "high",
     "medium",
     "low"
    ],
    "default_effort": "high"
   },
   "hugging_face": null
  },
  "measurement": {
   "status": "pending"
  },
  "note": null,
  "api_signature": "api_5d3cdea0",
  "api_matches": [
   "~anthropic/claude-sonnet-latest",
   "anthropic/claude-opus-4.7"
  ],
  "identity": {
   "kind": "lineage",
   "family": null,
   "confidence": "unknown",
   "confidence_reason": null,
   "basis": [],
   "contradiction": null,
   "declared_vs_measured": "unknown"
  },
  "comparator": null,
  "neighbours": []
 }
}