{
  "schema": "ab5d-essay-generation/1",
  "model": "gpt-6-astra",
  "displayName": "GPT-6 Astra",
  "scope": "Meridian measured delegated research and drafting through completed package; review, citation revisions, integration and publication excluded.",
  "essayCount": 1,
  "perEssayUsage": {
    "inputTokens": 2491236,
    "cachedInputTokens": 2433280,
    "outputTokens": 9390,
    "reasoningOutputTokens": 553,
    "totalTokens": 2500626
  },
  "usage": {
    "inputTokens": 2491236,
    "cachedInputTokens": 2433280,
    "outputTokens": 9390,
    "reasoningOutputTokens": 553,
    "totalTokens": 2500626
  },
  "usageSummary": "across Meridian measured delegated research and drafting.",
  "usageDetail": "Difference between last usage event before assignment and completed research package event. Idle time adds no tokens; previous integration and later editorial work excluded.",
  "accounting": "Cached input is included in input; reasoning output in output. Total is input plus output.",
  "source": "Measured difference of cumulative delegated session usage events",
  "measurementStart": "2026-09-17T23:39:17.403Z",
  "recordedAt": "2026-09-17T23:45:53.004Z"
}