{
  "schema_version": "1.1",
  "price_date": "2026-09-03",
  "categories": [
    {
      "key": "uncached_input",
      "label": "Other input",
      "definition": "Input neither stored nor reused from cache on that request."
    },
    {
      "key": "cache_write",
      "label": "Save input",
      "definition": "Input newly stored for reuse."
    },
    {
      "key": "cache_read",
      "label": "Reuse input",
      "definition": "Previously stored input reused on a request."
    },
    {
      "key": "output",
      "label": "Model output",
      "definition": "Generated output can include text, tool instructions, code, and billed reasoning. The records do not separate these amounts."
    }
  ],
  "runtime_pricing": {
    "usd_per_session_hour": "0.08",
    "verified_at": "2026-09-05",
    "saved_with_token_prices": false,
    "pricing_url": "https://platform.claude.com/docs/en/about-claude/pricing#claude-managed-agents-pricing",
    "usage_definition_url": "https://platform.claude.com/docs/en/managed-agents/events-and-streaming#tracking-usage",
    "announcement_url": "https://claude.com/blog/claude-managed-agents",
    "announcement_date": "2026-04-08",
    "provenance_note": "Runtime pricing was checked in official documentation on 5 September 2026. It was not saved with the 3 September token prices. The announcement is dated 8 April 2026 but is a live page, not an archived snapshot.",
    "usage_field": "task-usage.json: session_usage.active_seconds",
    "formula": "session_usage.active_seconds × usd_per_session_hour ÷ 3,600",
    "scope": "Session active time counts concurrent running threads once. It differs from measured completion time and summed thread time."
  },
  "calculation": {
    "label": "Token and runtime calculation",
    "formula": "Token charges: tokens × saved dollars per million ÷ 1,000,000, summed across four categories. Add active session seconds × $0.08 ÷ 3,600 for the full calculation.",
    "limits": [
      "Each calculation applies the configured task model's saved rates to all recorded usage. Individual request records do not identify their model.",
      "Request charges and their running sum are calculated, not observed bills. Each task has one recorded total bill.",
      "Task charges and counts end at the original recorded stop. The repeat Sonnet email reached its spending limit after saving the unchanged file. Its later directory check and follow-up account share an excluded $0.03 increment that cannot be split exactly.",
      "The existing calculated_cost_usd fields contain token charges only. Their category shares and request sums exclude runtime.",
      "Adding the published runtime charge matches all 30 recorded session costs when each calculated total is rounded to cents. The runtime rate was verified after the study; it was not in the saved token price file.",
      "Recorded minus calculated subtracts token charges only. Recorded minus full calculated shows the remaining difference before cent rounding. Neither field allocates a fee to a tool.",
      "All 30 snapshots record zero billable web-search requests. A zero web-fetch counter alone does not establish that no fetch occurred; that tool is not metered in this field.",
      "Fixed-usage comparisons change only the rate card. They do not predict another model's task cost, usage, speed, or quality.",
      "Tool calls are associated with requests; this does not assign a dollar cost to any tool."
    ],
    "share_denominators": {
      "share_of_all_tokens_pct": "All four token categories, including output. Reused input can be counted on multiple requests.",
      "share_of_calculated_cost_pct": "The sum of the four saved-rate calculated charges, not the recorded task bill.",
      "cache_read_share_of_input_pct": "Uncached input plus cache writes plus cache reads. This is a token share, not a request cache-hit rate."
    },
    "money_precision": "Token charges are exact USD decimal strings with eight places. Runtime and combined charges use 40-digit decimal arithmetic and are displayed to twelve places; active seconds and the rate remain available for reproduction. Cent checks round each full session total, then sum the rounded amounts. No midpoint tie occurs in these records."
  },
  "sources": {
    "prices": {
      "file": "rig/prices.json",
      "date": "2026-09-03",
      "sha256": "615556aef8d179f2c31f5ee328bdde0cbbaf5ced31c4f351709086687b2dffbf"
    },
    "field_mapping": {
      "uncached_input": "input_tokens",
      "cache_write": "cache_creation_input_tokens",
      "cache_read": "cache_read_input_tokens",
      "output": "output_tokens"
    },
    "recorded_bill": "task-usage.json: session_usage.list_cost.amount (USD cents) divided by 100",
    "task_stop": "Final events-task.jsonl session.status_idle; source record, file hash, event position, UTC time and stopping reason retained.",
    "headline_numeric_errors": "Error statuses among six selected output-headline-audit.json metrics, matched by output URL and hash in study.json; excludes other observations.",
    "recorded_bill_definition": "https://platform.claude.com/docs/en/managed-agents/events-and-streaming#tracking-usage",
    "runtime_seconds": "task-usage.json: session_usage.active_seconds",
    "server_tool_use": "task-usage.json: session_usage.server_tool_use; web_search_requests is zero for all 30 sessions",
    "request_tokens": "model-requests-task.jsonl: span.model_request_end.model_usage",
    "request_associations": "exploration-data.json: session requests[].call_ids, checked against matching raw usage",
    "cache_write_rate": "rig/prices.json: models[model].in_per_mtok × multipliers.cache_write_5m; all 30 snapshots record zero one-hour writes"
  },
  "sessions": [
    {
      "id": "run_one-b-haiku",
      "run": "run_one",
      "model": "haiku",
      "model_label": "Haiku 4.5",
      "task": "b",
      "task_label": "Forecast email",
      "validation_pass": false,
      "task_stop_reason": "end_turn",
      "task_stop_event": {
        "record": "runs/managed-agents-pilot-2026-09-03-v2/b-haiku-r1/events-task.jsonl",
        "sha256": "4b7666d5aedb7824142009fec4da069eeee0cb87c84d5c9446a2b16b081e6263",
        "event_index": 83,
        "processed_at": "2026-09-03T18:41:29.453776Z",
        "event_type": "session.status_idle"
      },
      "headline_numeric_errors": 0,
      "recorded_cost_usd": "0.09000000",
      "calculated_cost_usd": "0.08798055",
      "recorded_minus_calculated_usd": "0.00201945",
      "active_seconds": "107.207",
      "runtime_calculated_cost_usd": "0.002382377778",
      "full_calculated_cost_usd": "0.090362927778",
      "full_calculated_cost_rounded_usd": "0.09",
      "recorded_minus_full_calculated_usd": "-0.000362927778",
      "full_calculated_matches_recorded_cents": true,
      "server_tool_use": {
        "web_fetch_requests": 0,
        "web_search_requests": 0
      },
      "total_tokens": 191345,
      "total_input_tokens": 182560,
      "request_count": 17,
      "average_input_tokens_per_request": "10738.823529",
      "cache_read_share_of_input_pct": "87.698839",
      "categories": {
        "uncached_input": {
          "tokens": 104,
          "rate_usd_per_million": "1.0",
          "calculated_cost_usd": "0.00010400",
          "share_of_all_tokens_pct": "0.054352",
          "share_of_calculated_cost_pct": "0.118208"
        },
        "cache_write": {
          "tokens": 22353,
          "rate_usd_per_million": "1.250",
          "calculated_cost_usd": "0.02794125",
          "share_of_all_tokens_pct": "11.682040",
          "share_of_calculated_cost_pct": "31.758440"
        },
        "cache_read": {
          "tokens": 160103,
          "rate_usd_per_million": "0.1",
          "calculated_cost_usd": "0.01601030",
          "share_of_all_tokens_pct": "83.672424",
          "share_of_calculated_cost_pct": "18.197545"
        },
        "output": {
          "tokens": 8785,
          "rate_usd_per_million": "5.0",
          "calculated_cost_usd": "0.04392500",
          "share_of_all_tokens_pct": "4.591183",
          "share_of_calculated_cost_pct": "49.925807"
        }
      },
      "requests": [
        {
          "index": 1,
          "start_seconds": 1e-06,
          "end_seconds": 3.652006,
          "call_ids": [
            "run_one-b-haiku-call-1"
          ],
          "tokens": {
            "uncached_input": 9,
            "cache_write": 4736,
            "cache_read": 0,
            "output": 337
          },
          "calculated_cost_usd": "0.00761400",
          "cumulative_calculated_cost_usd": "0.00761400",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000900",
            "cache_write": "0.00592000",
            "cache_read": "0.00000000",
            "output": "0.00168500"
          },
          "evidence": {
            "request_end_record_index": 2,
            "event_end_index": 8
          }
        },
        {
          "index": 2,
          "start_seconds": 4.895131,
          "end_seconds": 6.055401,
          "call_ids": [
            "run_one-b-haiku-call-2"
          ],
          "tokens": {
            "uncached_input": 5,
            "cache_write": 355,
            "cache_read": 4736,
            "output": 72
          },
          "calculated_cost_usd": "0.00128235",
          "cumulative_calculated_cost_usd": "0.00889635",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000500",
            "cache_write": "0.00044375",
            "cache_read": "0.00047360",
            "output": "0.00036000"
          },
          "evidence": {
            "request_end_record_index": 4,
            "event_end_index": 13
          }
        },
        {
          "index": 3,
          "start_seconds": 6.502494,
          "end_seconds": 7.605646,
          "call_ids": [
            "run_one-b-haiku-call-3"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 112,
            "cache_read": 5091,
            "output": 59
          },
          "calculated_cost_usd": "0.00095010",
          "cumulative_calculated_cost_usd": "0.00984645",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00014000",
            "cache_read": "0.00050910",
            "output": "0.00029500"
          },
          "evidence": {
            "request_end_record_index": 6,
            "event_end_index": 17
          }
        },
        {
          "index": 4,
          "start_seconds": 8.046806,
          "end_seconds": 9.036298,
          "call_ids": [
            "run_one-b-haiku-call-4"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 187,
            "cache_read": 5203,
            "output": 61
          },
          "calculated_cost_usd": "0.00106505",
          "cumulative_calculated_cost_usd": "0.01091150",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00023375",
            "cache_read": "0.00052030",
            "output": "0.00030500"
          },
          "evidence": {
            "request_end_record_index": 8,
            "event_end_index": 21
          }
        },
        {
          "index": 5,
          "start_seconds": 9.551967,
          "end_seconds": 10.526238,
          "call_ids": [
            "run_one-b-haiku-call-5"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 162,
            "cache_read": 5390,
            "output": 65
          },
          "calculated_cost_usd": "0.00107250",
          "cumulative_calculated_cost_usd": "0.01198400",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00020250",
            "cache_read": "0.00053900",
            "output": "0.00032500"
          },
          "evidence": {
            "request_end_record_index": 10,
            "event_end_index": 25
          }
        },
        {
          "index": 6,
          "start_seconds": 11.029563,
          "end_seconds": 12.101926,
          "call_ids": [
            "run_one-b-haiku-call-6"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 164,
            "cache_read": 5552,
            "output": 69
          },
          "calculated_cost_usd": "0.00111120",
          "cumulative_calculated_cost_usd": "0.01309520",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00020500",
            "cache_read": "0.00055520",
            "output": "0.00034500"
          },
          "evidence": {
            "request_end_record_index": 12,
            "event_end_index": 29
          }
        },
        {
          "index": 7,
          "start_seconds": 12.693651,
          "end_seconds": 14.123841,
          "call_ids": [
            "run_one-b-haiku-call-7"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 290,
            "cache_read": 5716,
            "output": 83
          },
          "calculated_cost_usd": "0.00135510",
          "cumulative_calculated_cost_usd": "0.01445030",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00036250",
            "cache_read": "0.00057160",
            "output": "0.00041500"
          },
          "evidence": {
            "request_end_record_index": 14,
            "event_end_index": 34
          }
        },
        {
          "index": 8,
          "start_seconds": 15.277238,
          "end_seconds": 16.375416,
          "call_ids": [
            "run_one-b-haiku-call-8"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 383,
            "cache_read": 6006,
            "output": 83
          },
          "calculated_cost_usd": "0.00150035",
          "cumulative_calculated_cost_usd": "0.01595065",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00047875",
            "cache_read": "0.00060060",
            "output": "0.00041500"
          },
          "evidence": {
            "request_end_record_index": 16,
            "event_end_index": 39
          }
        },
        {
          "index": 9,
          "start_seconds": 17.334032,
          "end_seconds": 18.7328,
          "call_ids": [
            "run_one-b-haiku-call-9"
          ],
          "tokens": {
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            "cache_write": 1904,
            "cache_read": 6389,
            "output": 73
          },
          "calculated_cost_usd": "0.00338990",
          "cumulative_calculated_cost_usd": "0.01934055",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00238000",
            "cache_read": "0.00063890",
            "output": "0.00036500"
          },
          "evidence": {
            "request_end_record_index": 18,
            "event_end_index": 43
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        },
        {
          "index": 10,
          "start_seconds": 19.576959,
          "end_seconds": 20.941802,
          "call_ids": [
            "run_one-b-haiku-call-10"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 1888,
            "cache_read": 8293,
            "output": 71
          },
          "calculated_cost_usd": "0.00355030",
          "cumulative_calculated_cost_usd": "0.02289085",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00236000",
            "cache_read": "0.00082930",
            "output": "0.00035500"
          },
          "evidence": {
            "request_end_record_index": 20,
            "event_end_index": 47
          }
        },
        {
          "index": 11,
          "start_seconds": 21.828014,
          "end_seconds": 22.9711,
          "call_ids": [
            "run_one-b-haiku-call-11"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 252,
            "cache_read": 10181,
            "output": 73
          },
          "calculated_cost_usd": "0.00170410",
          "cumulative_calculated_cost_usd": "0.02459495",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00031500",
            "cache_read": "0.00101810",
            "output": "0.00036500"
          },
          "evidence": {
            "request_end_record_index": 22,
            "event_end_index": 51
          }
        },
        {
          "index": 12,
          "start_seconds": 23.851004,
          "end_seconds": 47.073577,
          "call_ids": [
            "run_one-b-haiku-call-12"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 787,
            "cache_read": 10433,
            "output": 2742
          },
          "calculated_cost_usd": "0.01574305",
          "cumulative_calculated_cost_usd": "0.04033800",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00098375",
            "cache_read": "0.00104330",
            "output": "0.01371000"
          },
          "evidence": {
            "request_end_record_index": 24,
            "event_end_index": 56
          }
        },
        {
          "index": 13,
          "start_seconds": 48.992481,
          "end_seconds": 71.069953,
          "call_ids": [
            "run_one-b-haiku-call-13"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 4231,
            "cache_read": 11220,
            "output": 2505
          },
          "calculated_cost_usd": "0.01894175",
          "cumulative_calculated_cost_usd": "0.05927975",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00528875",
            "cache_read": "0.00112200",
            "output": "0.01252500"
          },
          "evidence": {
            "request_end_record_index": 26,
            "event_end_index": 61
          }
        },
        {
          "index": 14,
          "start_seconds": 71.815553,
          "end_seconds": 89.667095,
          "call_ids": [
            "run_one-b-haiku-call-14"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 3627,
            "cache_read": 15451,
            "output": 1443
          },
          "calculated_cost_usd": "0.01329985",
          "cumulative_calculated_cost_usd": "0.07257960",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00453375",
            "cache_read": "0.00154510",
            "output": "0.00721500"
          },
          "evidence": {
            "request_end_record_index": 28,
            "event_end_index": 66
          }
        },
        {
          "index": 15,
          "start_seconds": 90.106705,
          "end_seconds": 92.817527,
          "call_ids": [
            "run_one-b-haiku-call-15"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 1473,
            "cache_read": 19078,
            "output": 185
          },
          "calculated_cost_usd": "0.00468005",
          "cumulative_calculated_cost_usd": "0.07725965",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00184125",
            "cache_read": "0.00190780",
            "output": "0.00092500"
          },
          "evidence": {
            "request_end_record_index": 30,
            "event_end_index": 71
          }
        },
        {
          "index": 16,
          "start_seconds": 93.254398,
          "end_seconds": 94.959455,
          "call_ids": [
            "run_one-b-haiku-call-16"
          ],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 262,
            "cache_read": 20551,
            "output": 82
          },
          "calculated_cost_usd": "0.00279860",
          "cumulative_calculated_cost_usd": "0.08005825",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00032750",
            "cache_read": "0.00205510",
            "output": "0.00041000"
          },
          "evidence": {
            "request_end_record_index": 32,
            "event_end_index": 76
          }
        },
        {
          "index": 17,
          "start_seconds": 95.564279,
          "end_seconds": 106.757341,
          "call_ids": [],
          "tokens": {
            "uncached_input": 6,
            "cache_write": 1540,
            "cache_read": 20813,
            "output": 782
          },
          "calculated_cost_usd": "0.00792230",
          "cumulative_calculated_cost_usd": "0.08798055",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00000600",
            "cache_write": "0.00192500",
            "cache_read": "0.00208130",
            "output": "0.00391000"
          },
          "evidence": {
            "request_end_record_index": 34,
            "event_end_index": 80
          }
        }
      ],
      "fixed_usage_price_comparisons": [
        {
          "model": "haiku",
          "model_label": "Haiku 4.5",
          "rate_model": "haiku",
          "rate_model_label": "Haiku 4.5",
          "calculated_cost_usd": "0.08798055",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00010400",
            "cache_write": "0.02794125",
            "cache_read": "0.01601030",
            "output": "0.04392500"
          }
        },
        {
          "model": "sonnet",
          "model_label": "Sonnet 5",
          "rate_model": "sonnet",
          "rate_model_label": "Sonnet 5",
          "calculated_cost_usd": "0.17596110",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00020800",
            "cache_write": "0.05588250",
            "cache_read": "0.03202060",
            "output": "0.08785000"
          }
        },
        {
          "model": "opus",
          "model_label": "Opus 5",
          "rate_model": "opus",
          "rate_model_label": "Opus 5",
          "calculated_cost_usd": "0.43990275",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00052000",
            "cache_write": "0.13970625",
            "cache_read": "0.08005150",
            "output": "0.21962500"
          }
        },
        {
          "model": "fable",
          "model_label": "Fable 5",
          "rate_model": "fable",
          "rate_model_label": "Fable 5",
          "calculated_cost_usd": "0.87980550",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00104000",
            "cache_write": "0.27941250",
            "cache_read": "0.16010300",
            "output": "0.43925000"
          }
        },
        {
          "model": "fable-5.1",
          "model_label": "Fable 5.1",
          "rate_model": "fable-5.1",
          "rate_model_label": "Fable 5.1",
          "calculated_cost_usd": "0.75972825",
          "category_calculated_cost_usd": {
            "uncached_input": "0.00104000",
            "cache_write": "0.27941250",
            "cache_read": "0.04002575",
            "output": "0.43925000"
          }
        }
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}
