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Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Prepare a dog walker's monthly owner statements with extra-dog pricing and bank holiday surcharges

AClaude Sonnet 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-22 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first try
Estimated cost
$0.05
Wall time
9s
Human step-ins
0
Outcome
Pass

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Summary

Exact prompt

# Prepare a dog walker's owner statements for December Inputs: `walks.csv` (each walk: owner, date, type, minutes, dogs) and `rates.json` (the rate per walk for each type and length, and the bank holiday dates). Every amount is in pounds. Pricing rules, per walk: - The walk rate comes from rates.json by type (solo or group) and minutes (30 or 60). - Walk price = the rate for the first dog plus half the rate for each further dog on that walk. - A walk on a date listed in bank_holidays carries a surcharge of 20% of the whole walk price; there is no surcharge on other days, weekends included. - Round each walk's price and each surcharge to the cent half-up before adding anything up. Write `out/statement.json`: `{"base": {"<owner>": <sum of walk prices>, ...}, "surcharge": {...}, "total": {...}, "grand_total": <sum of the totals>}` with every owner in `walks.csv`. ## 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.

Turn a month of walk records into owner statements. Each walk is priced by type and length, every dog after the first on a walk costs half the rate, and walks on listed bank holidays carry a 20% surcharge. Charging every dog in full, surcharging only the first dog or surcharging weekends too each change the statements. 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: extra_dogs bank_holiday_surcharge totals

Setup notes: Batch 25 case a02-dog-walking-statements (offline, synthetic inputs, seed 2063823445). 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 0.11 (8 cores). Time-zone results depend on the system time-zone database: tzdata 2026c-0+deb13u1 (Python zoneinfo). Claude Code's own reported cost for claude-sonnet-5.5: $0.048671. Score: 3/3. 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
9s
Human step-ins
0
Turns
4
Model usage
ModelInput tokOutput tokCost
AClaude Sonnet 5.5anthropic/claude-sonnet-5.5effort default (no --effort flag) · thinking on77,1171,013$0.05

Reproduce this run

  1. Use the use case prompt on the use case page.
  2. 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.
  3. It counts as a success only if it meets every success criterion: extra_dogs bank_holiday_surcharge totals
  4. 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

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Evidence log
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    "provider": "firstParty",
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  "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,
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   },
   "started_in_background": 0,
   "max_depth": 0,
   "spawned_by_subagents": 0,
   "completed": 0,
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   "killed": {
    "parent": 0,
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  "subtype": "success",
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  "result": "I've written `out/statement.json` with base, surcharge and total for all six owners, plus the grand total. I haven't checked the figures against anything other than the pricing rules. The grand total for December is \u00a3474.15.\n\n| Owner | Base | Surcharge | Total |\n|---|---|---|---|\n| Dr Hale | 72.21 | 4.15 | 76.36 |\n| J. Lindqvist | 77.18 | 7.10 | 84.28 |\n| Tom & Ruth | 70.58 | 1.42 | 72.00 |\n| The Okafors | 110.64 | 2.21 | 112.85 |\n| The Byrnes | 56.46 | 3.55 | 60.01 |\n| Sam Achebe | 65.88 | 2.77 | 68.65 |\n\nEach walk price and each surcharge was rounded half-up to the cent before summing. Surcharges apply only to walks on 25 or 28 December.\n\nI wrote nothing to `ask/`.",
  "ttft_ms": 1537,
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  "uuid": "[REDACTED]",
  "ttft_stream_ms": 867,
  "time_to_request_ms": 262,
  "first_content_frame_ms": 867,
  "queued_turn_count": 0,
  "result_index": 0
 }
]

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