Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Go/no-go departure time from a gridded wind file

[
 {
  "duration_api_ms": 33916,
  "stop_reason": "end_turn",
  "session_id": "[REDACTED]",
  "total_cost_usd": 0.1889712,
  "usage": {
   "input_tokens": 8,
   "cache_creation_input_tokens": 11339,
   "cache_read_input_tokens": 71436,
   "output_tokens": 4197,
   "output_tokens_details": {
    "thinking_tokens": 226
   },
   "server_tool_use": {
    "web_search_requests": 0,
    "web_fetch_requests": 0
   },
   "service_tier": "standard",
   "cache_creation": {
    "ephemeral_1h_input_tokens": 11339,
    "ephemeral_5m_input_tokens": 0
   },
   "inference_geo": "global",
   "iterations": [
    {
     "input_tokens": 2,
     "output_tokens": 570,
     "cache_read_input_tokens": 21976,
     "cache_creation_input_tokens": 1509,
     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 1509
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
   "claude-opus-5-5": {
    "inputTokens": 8,
    "outputTokens": 4197,
    "cacheReadInputTokens": 71436,
    "cacheCreationInputTokens": 11339,
    "webSearchRequests": 0,
    "costUSD": 0.1889712,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 226,
    "canonicalModel": "claude-opus-5-5",
    "provider": "firstParty",
    "costBasis": "list"
   }
  },
  "permission_denials": [],
  "terminal_reason": "completed",
  "fast_mode_state": "off",
  "fast_mode_disabled_reason": "sdk_opt_in_required",
  "subagent_stats": {
   "spawned": 0,
   "requested": {
    "background": 0,
    "foreground": 0,
    "unset": 0
   },
   "started_in_background": 0,
   "max_depth": 0,
   "spawned_by_subagents": 0,
   "completed": 0,
   "failed": 0,
   "killed": {
    "parent": 0,
    "user": 0,
    "system": 0
   },
   "refused": {
    "depth_limit": 0,
    "concurrency_limit": 0,
    "budget": 0
   },
   "by_type": {}
  },
  "safety_stops": 0,
  "is_error": false,
  "num_turns": 5,
  "subtype": "success",
  "api_error_status": null,
  "result": "I wrote `solve.py` and ran it on the provided input. It produced `answer.json` and `window.svg`, and the SVG parses as valid XML. I checked the results by reading them over, not against an independent calculation, and I didn't try any fresh inputs of my own.\n\n**Results for this input:**\n- **Course:** 39.98\u00b0.\n- **Departures 0\u201311 fail.** Hours 0\u20131 fail on `wind@6`, hours 2\u20136 on `gust@6`, hours 7\u20139 on wind at their own departure hour, and hours 10\u201311 on gust at their own departure hour.\n- **Departures 12\u201330 are all ok.** So `earliest_ok_h` is 12 and `longest_ok_run` is [12, 30].\n\n**Choices that go beyond the written rules:**\n- The u and v wind components are interpolated separately, and speed and direction are worked out afterwards. Interpolating speed directly would give different numbers.\n- Clamping at the edge of the grid works whether an axis runs up or down, and also handles an axis with only one value.\n- The `grid` path is looked up relative to `input.json`'s folder first, then relative to the current directory.\n- `window.svg` is written next to `answer.json`, and also to the current directory if that's somewhere else, since the brief doesn't say where it should go.\n- `window.svg` only uses plain shapes, text and `<title>` tooltips. `#timeline` has one coloured bar per departure hour. `#best-departure` outlines the longest ok run, marks the earliest ok hour, and has a text label.",
  "ttft_ms": 2351,
  "type": "result",
  "duration_ms": 34432,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 913,
  "time_to_request_ms": 309,
  "first_content_frame_ms": 913,
  "queued_turn_count": 0,
  "result_index": 0
 }
]