{
  "publisher": "ModelCap",
  "publishedAt": "2026-09-04",
  "describesDate": "2026-09-01",
  "recordType": "first-party-development-record-extract",
  "evidenceLimitations": [
    "These figures are extracted from ModelCap's retained development records, not an archived upstream leaderboard response.",
    "The application repository is private. Revision identifiers identify the internal records; they are not public source-code links.",
    "The v4.9 figures were recorded as a live preview. They do not establish an exact production cutover or catalogue listing time.",
    "Current model pages and live benchmark sites may show different values."
  ],
  "indexTransition": {
    "sourceRevision": "b70c83e2599a25a928fc7518dc95410e157c74fa",
    "v4_8": {
      "claudeFable5_1": { "score": 86.3, "pointEstimate": 93.1, "ownConfidence": 27.2 },
      "claudeFable5": { "score": 86.2 }
    },
    "v4_9Preview": {
      "claudeFable5_1": { "score": 90.7, "interval": [90.7, 95.5], "rank": 1 },
      "change": "A supported measured successor can recompute its interval using stronger predecessor confidence, while publishing its own confidence separately."
    }
  },
  "scoreV9MethodRecord": {
    "sourceRevision": "dd07e121a9b3a8d71a82410a221846ed396f8937",
    "sourceDocument": "docs/methodology/modelcap-score-v9.md",
    "recordedComparisons": [
      { "evaluation": "Artificial Analysis Intelligence Index", "claudeFable5_1": 65.7, "claudeFable5": 62.1 },
      { "evaluation": "Artificial Analysis Terminal-Bench 2.1", "claudeFable5_1": 91.4, "claudeFable5": 84.6 }
    ],
    "configuredEvaluatorShares": { "Arena": 0.662, "Artificial Analysis": 0.272, "SWE-bench": 0.03, "ARC Prize": 0.021, "BFCL": 0.0075, "WildClaw": 0.0075 },
    "nonAnchorShareCap": 0.3,
    "capLimitation": "The cap applies to configured total source weight, not a maximum possible change in a model score or rank.",
    "packagingChange": { "rankedModelsBefore": 236, "rankedModelsAfter": 248, "productsRegainingSeats": 12 }
  }
}