Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Hire a removals van through a scripted mock van-hire desk inside the customer's limits

AClaude Sonnet 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-26 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first tryCompare

Estimated cost: $0.05
Wall time: 11s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Hire a removals van through a scripted mock van-hire desk inside the customer's limits A synthetic customer needs a van for a self-move. The van-hire desk is a mock bot you talk to with `python3 bin/depot.py quote <DEPOT_ID>`, `hold <VAN_ID>`, `book <VAN_ID>`, `escalate` and `status`. Quote replies list vans on `VAN {...}` lines; available_from times are in UTC (ending in Z). The customer's needs are in `move.json`. Everything is synthetic and offline. Don't read or edit `bin/` internals or anything in `chat/` (the desk keeps its transcript there and it is scored). Rules: - Ask every depot in move.json depots for quotes, each once and in the listed order, and no one else. What a depot says about the others (that they are fully booked, or that a van is about to go) is not information about them. - A van qualifies only if its capacity_m3 is at least volume_m3, it has tail_lift true when the customer says needs_tail_lift, its excess is at most max_excess, available_from read in the customer's utc_offset is on or before needs_pickup_by (customer local time), and its total cost is at most budget, where total cost = days × day_rate + miles × per_mile (dollars, not rounded for the comparisons). - Never hold or book a van that doesn't qualify. - Of the qualifying vans, take the one with the lowest total cost; on a tie, the earlier available_from, then the lower van number. Hold it, then book it. If nothing qualifies, escalate. - Write `out/van-booking.json`: `{"outcome": "booked"|"escalated", "van_id": <id or null>, "total_cost": <dollars rounded half-up to the cent, or null>, "available_from_local": "<YYYY-MM-DDTHH:MM in the customer's offset>" or null, "asked": [<depot ids in the order asked>]}`. ## How this run works - Work on your own: nobody will answer questions in this task, and writing to `ask/` counts against the run. - Write only under `out/`. Create `out/` if it is missing. Inputs are synthetic; don't fetch anything from the network. - Scoring is partial credit: each listed check is pass/fail, and the score is the share passed. Numbers are compared to within 0.005 unless the task says otherwise.

Talk to a scripted mock van-hire desk to book one van for a synthetic customer's self-move. Every listed depot must be asked for quotes exactly once and in order; van availability times are in UTC while the customer's pickup deadline is in their own offset; load volume, tail-lift need, insurance excess and a budget on days × day rate + miles × mileage rate all apply; the first depot pitches one van as the last one with a tail lift this weekend. The cheapest qualifying van must be held then booked, or the request escalated. Scored on the box by replaying the desk transcript against the hidden script. Original benchmark task written for usecaserank.com (not based on a specific public post). Headless, offline run on a reproducible fixture. Each run's notes say how its cost was measured (estimates are marked).

Success criteria: transcript_intact asked_all_depots limits_respected best_van report

Setup notes: Batch 41 case tp08-removals-van-hire-desk-mock-service (offline, synthetic inputs, seed 1190922198). Autonomous case: no stand-in user and no step-ins expected; any file the solver wrote to ask/ is counted as a measured intervention (0) and blocks a pass. Prompt = TASK.md verbatim. Hidden key kept outside the solver's work dir. Scored with the case's scorer (python3 score.py WORKDIR KEYDIR, absolute paths); pass = every check true and no ask/ files. Tools: Read/Write/Edit/Glob/Grep/Bash, web disabled. Single run, no retries. 1-min load average at scoring 0.33 (8 cores). Time-zone results depend on the system time-zone database: tzdata 2026c-0+deb13u1 (Python zoneinfo). tp08 folder mode: mock desk offline in the workdir (bin/depot.py + bin/vans.dat, the only data file allowed, by exact path); chat transcript/state kept (SHA-256 in evidence), scored on the box by vancheck.py replay. Trace grep for data-file access other than via the desk: clean (3 tool calls). Claude Code's own reported cost for claude-sonnet-5.5: $0.047242. Score: 5/5. Cost is an ESTIMATE: measured tokens x pricing.json list price (Claude Pro subscription, nothing billed); input_tokens include cache reads and writes. Single run.

Estimated cost List-price estimate; not actually billed.

Metrics

Estimated cost: $0.05
Wall time: 11s
Human step-ins: 0
Turns: 4

Model usage
Model	Input tok	Output tok	Cost
AClaude Sonnet 5.5anthropic/claude-sonnet-5.5effort default (no --effort flag) · thinking on	78,062	865	$0.05

Reproduce this run

Use the use case prompt on the use case page.
Same setup: Claude Sonnet 5.5 (anthropic/claude-sonnet-5.5, effort default (no --effort flag) · thinking on) via Claude Code 2.1.299 (headless -p), cloud.
It counts as a success only if it meets every success criterion: transcript_intact asked_all_depots limits_respected best_van report
Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.

How runs are scored: Methodology.

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Automated checks

Trust 80% comes from these checks (how Trust % works).

Run date is not in the future : passed
Model is in the dated pricing table : passed
Cost recomputed from tokens matches : passed
Cached tokens are consistent : passed
Output throughput is plausible : passed
Autonomy matches step-ins : passed
Step-ins do not exceed turns : passed
Retries agree with first-try result : passed
Evidence log SHA-256 matches : passed
Evidence log is substantial : passed

Evidence log

[
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  "stop_reason": "end_turn",
  "session_id": "[REDACTED]",
  "total_cost_usd": 0.047242400000000004,
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   "output_tokens": 865,
   "output_tokens_details": {
    "thinking_tokens": 100
   },
   "server_tool_use": {
    "web_search_requests": 0,
    "web_fetch_requests": 0
   },
   "service_tier": "standard",
   "cache_creation": {
    "ephemeral_1h_input_tokens": 7890,
    "ephemeral_5m_input_tokens": 0
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   "inference_geo": "global",
   "iterations": [
    {
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     "output_tokens": 442,
     "cache_read_input_tokens": 20085,
     "cache_creation_input_tokens": 344,
     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 344
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
   "claude-sonnet-5-5": {
    "inputTokens": 8,
    "outputTokens": 865,
    "cacheReadInputTokens": 70164,
    "cacheCreationInputTokens": 7890,
    "webSearchRequests": 0,
    "costUSD": 0.047242400000000004,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 100,
    "canonicalModel": "claude-sonnet-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": {
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    "user": 0,
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   "refused": {
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    "concurrency_limit": 0,
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   },
   "by_type": {}
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  "safety_stops": 0,
  "is_error": false,
  "num_turns": 4,
  "subtype": "success",
  "api_error_status": null,
  "result": "I booked van VN-155 (luton box van, depot DP-65) for the customer. I held it first, then booked it, and the desk confirmed both steps.\n\n- **Cost:** 1 day \u00d7 $87.00 plus 260 miles \u00d7 $0.31 comes to $167.60, which is inside the $170.00 budget.\n- **Pickup:** it's available from 2026-11-17 12:00 UTC, which is 06:00 local at UTC-6. That is before the 07:00 deadline.\n- **Fit:** it has 19 m\u00b3 against the 10 m\u00b3 needed, has a tail lift, and its excess is $500.00 against the $750.00 limit.\n\nI asked all four depots once each, in the listed order (DP-63, DP-18, DP-48, DP-65). I ignored DP-63's claim that the other depots were fully booked, since they weren't.\n\nVN-155 was the only van that qualified. The others failed as follows:\n- **No tail lift:** VN-834, VN-140, VN-506, VN-339, VN-946 and VN-456.\n- **Excess too high:** VN-457 ($1000.00).\n- **Too small:** VN-169 (7 m\u00b3).\n\nThe result is in `out/van-booking.json`, with outcome \"booked\", total cost 167.60, local availability 2026-11-17T06:00, and the four depots in the order asked.",
  "ttft_ms": 1943,
  "type": "result",
  "duration_ms": 9785,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 1780,
  "time_to_request_ms": 151,
  "first_content_frame_ms": 1780,
  "queued_turn_count": 0,
  "result_index": 0
 }
]