{
  "collectedAt": "2026-09-14",
  "scopeNote": "Devin × gpt-6-astra 周池大样本复核。cc usage 面板（E:\\工具\\cc usage）本周 Astra-only 口径：87pt 用量段（剩余 100%→13%）对 gpt-6-astra-high 单列 305,025,580 tokens，样本量为 round2 采用段（81.2M / 20pt）的 3.76 倍且顶到周池尾部。裁定只算 Astra，其他模型免费不计额度。",
  "items": [
    {
      "planId": "devin_max",
      "planName": "Devin Max",
      "priceUsd": 200,
      "priceSource": "https://devin.ai/pricing（Max $200/month，周额度、无日上限）",
      "model": "gpt-6-astra",
      "panelModelName": "gpt-6-astra-high",
      "evidenceType": "user_dashboard_backcalculation",
      "source": "维护者本人 Devin 账号 cc usage 面板截图，2026-09-14 17:27；云端剩余 13% / 已用 87%，本周 Astra 单列",
      "sourceDate": "2026-09-14",
      "userConfirmation": "维护者原话：只算astra就行，其他应该是免费的；devin astra更准确的数据出来了",
      "observedSegment": {
        "remainingFrom": 1.0,
        "remainingTo": 0.13,
        "deltaPercentPoints": 87,
        "window": "周额度（面板标题『本周』；Devin Max 官方口径为周池、无日上限）",
        "modelRow": {
          "model": "gpt-6-astra-high",
          "calls": 667,
          "input": 1998,
          "output": 369918,
          "cacheRead": 300944710,
          "cacheCreate": 3708954,
          "total": 305025580
        },
        "verification": "1998 + 369918 + 300944710 + 3708954 = 305025580，与面板 total 自洽"
      },
      "calculation": {
        "tokensPerPercent": 3506041.149,
        "weeklyTokens": 350604115,
        "monthlyTokensExact": 1402416460,
        "adoptedMonthlyYi": 14.02,
        "formula": "305,025,580 / 87% × 4 周",
        "roundedPercentMonthlyLow": 1394402651,
        "roundedPercentMonthlyHigh": 1410522913,
        "roundedPercentNote": "面板 13%/87% 为取整读数，真实已用约 86.5%~87.5%，对应约 13.94~14.11 亿/月；区间宽度仅为 round2（15.85~16.64 亿）的约 1/5"
      },
      "tokenComposition": {
        "cacheHitRateAdoptedConvention": 0.98782,
        "formula": "cache_read / (input + cache_read + cache_create) = 300,944,710 / 304,655,662，沿用 round3 裁定口径",
        "note": "命中率 98.78% 与 round2/3 段（97.84%）同量级，均为极端缓存型负载；output 占 0.12%，fresh input ≈ 0"
      },
      "excluded": {
        "nonAstraTokens": 19508347,
        "models": "swe-2-max 等本地/免费模型",
        "reason": "确认其他模型免费不计额度；cc usage 已按 Astra-only 口径重算（devin-checkpoint-13pct.md，在工具目录非本项目）"
      },
      "comparisonWithRound2": {
        "round2WeeklyBackcalc": 406036145,
        "thisWeeklyBackcalc": 350604115,
        "delta": "-13.7%",
        "interpretation": "两次反推同账号同套餐周池不一致：round2 为 20pt 取整段（真实占比 19.5~20.5% 时周池 3.96~4.16 亿），本次为 87pt 近满周段，区间更紧；差异方向说明 round2 段可能含取整偏差或周池在此间下调，本样本统计效力更高"
      },
      "confidence": "high（维护者面板直读、近满周 87pt 大样本、total 与分项自洽；相对 round2 为更优样本）",
      "decision": "已采用（2026-09-14 裁定）：devin_max × gpt-6-astra 16.24 → 14.02 亿/月（周池 3.506 亿）。build_adopted.py 的 DEVIN_MAX_ASTRA_USED_TOKENS/FRACTION 已改为 305,025,580 / 0.87；round2/3 文件留作历史证据不覆盖。"
    }
  ],
  "notFound": [
    "Devin 官方公布的周池绝对 token / ACU 数值（仍无官方锚点，两次反推差 13.7% 无法对账）",
    "该 87pt 段是否跨多次周重置（面板仅显示本周累计，若跨窗则周池反推失效——但『本周』标题与剩余 13% 同屏，按单窗理解）"
  ]
}