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Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Reimburse a month of business mileage with a yearly rate threshold, home-start commute deductions and passengers

AClaude Sonnet 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-21 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first try
Estimated cost
$0.06
Wall time
15s
Human step-ins
0
Outcome
Pass

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Summary

Exact prompt

# Pay October's mileage claims Inputs: `employees.csv` (normal one-way commute in miles and business miles already claimed this tax year before October), `trips.csv` (October trip log) and `mileage-policy.json`. Work out each employee's mileage payment for October 2026. - Trips with purpose `commute` are not paid and don't count toward any total. - A business trip whose `start` is `home` has the employee's `commute_miles` deducted from its miles (never below 0). That deduction is not business mileage. - Business miles are paid at `rate_high` until the employee's tax-year business miles reach `threshold_miles`, then at `rate_low`. Take trips in date order (then trip_id); a trip that crosses the threshold is split at it. - Each passenger adds `passenger_rate` per business mile of that trip. - Work exactly; round only the reported figures, to 2 decimals half-up. Write `out/mileage.json`: `{"payment": {"<employee_id>": <October payment>, ...}, "business_miles": {"<employee_id>": <October business miles after deductions>, ...}, "total_payment": <sum of the rounded payments>}`. List every employee with a paid trip. ## 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.

Pay staff mileage claims for a month from a trip log. The higher per-mile rate applies only until each person's tax-year business miles pass a threshold, which can happen partway through a trip, trips that start from home lose the person's normal commute, commuting trips pay nothing, and carrying a colleague adds a passenger supplement. Ignoring year-to-date miles, the commute deduction or the passenger rule each changes someone's payment. 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: payments home_start_deduction threshold_split commute_and_passengers

Setup notes: Batch 22 case x05-mileage-reimbursement (offline, synthetic inputs, seed 1646419454). 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 0.48 (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: $0.055306. Score: 4/4. 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
$0.06
Wall time
15s
Human step-ins
0
Turns
4
Model usage
ModelInput tokOutput tokCost
AClaude Sonnet 5.5anthropic/claude-sonnet-5.5effort default (no --effort flag) · thinking on78,2491,439$0.06

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: payments home_start_deduction threshold_split commute_and_passengers
  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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   "server_tool_use": {
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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,
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  "result": "I've written `out/mileage.json` with October payments for all 8 employees; the total is 2,333.80. I haven't checked the figures independently.\n\n| Employee | October payment | Business miles after deductions |\n|---|---|---|\n| M30 | 340.70 | 973 |\n| M35 | 217.25 | 691 |\n| M40 | 468.50 | 996 |\n| M45 | 81.35 | 312 |\n| M50 | 294.25 | 635 |\n| M55 | 261.55 | 595 |\n| M60 | 174.55 | 463 |\n| M65 | 495.65 | 1,123 |\n\n- **Year-to-date miles:** I used each employee's `ytd_business_miles` as given for the tax year before October. I did not use the `tax_year_starts` date in the policy file.\n- **Passenger pay:** passenger pay is based on the trip's business miles after any home-start commute deduction.\n\nI calculated in exact decimals and rounded only the reported figures to 2 decimals, half-up. The script I used is `/tmp/m.py`, outside `out/`.",
  "ttft_ms": 2103,
  "type": "result",
  "duration_ms": 13963,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 1270,
  "time_to_request_ms": 268,
  "first_content_frame_ms": 1271,
  "queued_turn_count": 0,
  "result_index": 0
 }
]

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