{
 "restated_at": "2026-09-21",
 "basis": "Artificial Analysis Intelligence Index, restated basis",
 "source": "https://artificialanalysis.ai/models",
 "restatements": [
  {
   "model": "Claude Fable 5.1",
   "prior_value": 53,
   "prior_basis": "current",
   "restated_value": 53.4,
   "restated_basis": "current",
   "matched_universe_row": "Claude Fable 5.1",
   "note": null
  },
  {
   "model": "GPT-6 Astra",
   "prior_value": 53,
   "prior_basis": "current",
   "restated_value": 52.7,
   "restated_basis": "current",
   "matched_universe_row": "GPT-6 Astra",
   "note": null
  },
  {
   "model": "Gemini 3.8 Flash",
   "prior_value": 41,
   "prior_basis": "current",
   "restated_value": 40.9,
   "restated_basis": "current",
   "matched_universe_row": "Gemini 3.8 Flash",
   "note": null
  },
  {
   "model": "Kimi K3 (max)",
   "prior_value": 50,
   "prior_basis": "current",
   "restated_value": 43.6,
   "restated_basis": "current",
   "matched_universe_row": "Kimi K3",
   "note": "the register prices the max-effort variant; the index score published is for Kimi K3, and no separate score for the max variant is published"
  },
  {
   "model": "Grok 4.6",
   "prior_value": 44,
   "prior_basis": "current-derived",
   "restated_value": 44.3,
   "restated_basis": "current",
   "matched_universe_row": "Grok 4.6",
   "note": null
  },
  {
   "model": "Claude Opus 5",
   "prior_value": 63,
   "prior_basis": "launch",
   "restated_value": 50.8,
   "restated_basis": "current",
   "matched_universe_row": "Claude Opus 5",
   "note": null
  },
  {
   "model": "Claude Opus 5 (routed)",
   "prior_value": 63,
   "prior_basis": "launch",
   "restated_value": 50.8,
   "restated_basis": "current",
   "matched_universe_row": "Claude Opus 5",
   "note": "same model reached through a router, so it carries the same index score and a different rate card"
  },
  {
   "model": "GPT-5.6 Sol",
   "prior_value": 59,
   "prior_basis": "launch",
   "restated_value": 47.0,
   "restated_basis": "current",
   "matched_universe_row": "GPT-5.6 Sol",
   "note": null
  },
  {
   "model": "GPT-5.6 Terra",
   "prior_value": 55,
   "prior_basis": "launch",
   "restated_value": 42.1,
   "restated_basis": "current",
   "matched_universe_row": "GPT-5.6 Terra",
   "note": null
  },
  {
   "model": "GPT-5.6 Luna",
   "prior_value": 51,
   "prior_basis": "launch",
   "restated_value": 37.3,
   "restated_basis": "current",
   "matched_universe_row": "GPT-5.6 Luna",
   "note": null
  }
 ],
 "excluded": [
  {
   "model": "DeepSeek V4 Flash 0731",
   "prior_value": 35,
   "prior_basis": "current",
   "reason": "no score for this model on the restated index"
  },
  {
   "model": "Muse Spark 1.1",
   "prior_value": 51,
   "prior_basis": "launch",
   "reason": "no score for this model on the restated index"
  }
 ]
}