Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Reconcile a print shop's job tickets against its printers' meter readings and work out takings

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: $0.06
Wall time: 31s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Reconcile a print shop's job tickets against its printers' meter readings and work out takings Inputs: `printers.csv` (printer_id, kind, price_per_page), `accounts.csv` (account_id, name), `jobs.csv` (job_id, date, printer_id, account_id, pages, copies, status), `meters.csv` (printer_id, date, open_count, close_count) and `period.json` (period_start, period_end, both dates included). All printers, accounts and jobs are synthetic; prices are in dollars. These rules are the shop's; where `counter-notes.txt` disagrees, the rules win. Rules: - Meter readings: a printer-day's meter impressions are close_count minus open_count. The counter has six digits and rolls over from 999999 to 000000, so when close_count is lower than open_count, add 1000000. - Job impressions: a job's impressions are pages × copies. Jobs with status `done` or `reprint` were printed; `void` jobs were cancelled before printing and count nowhere. - Discrepancies: each printer-day may have up to 15 meter impressions that no job explains (warm-up and test pages). A printer-day is a discrepancy when its meter impressions minus the impressions of the printed jobs on that printer that day is more than 15 or less than 0. - Billing: a `done` job is billed pages × copies × its printer's price_per_page, less 10% when copies is 50 or more (a bulk job). `reprint` jobs redo the shop's own mistakes and are free; `void` jobs are not billed. Don't round until the output. - Write `out/reconciliation.json`: `{"discrepancies": [<sorted "<printer_id>@<YYYY-MM-DD>" strings>], "meter_impressions_total": <number>, "bulk_jobs": [<sorted job_ids billed with the bulk discount>], "billed_total": <dollars>, "takings_by_printer": {"<printer_id>": <dollars>, ...}, "takings_by_account": {"<account_id>": <dollars>, ...}}`. - Roll-ups: Printers in printers.csv with no billed jobs are included at 0. Accounts in accounts.csv with no billed jobs are included at 0. ## 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.

Check a week of a synthetic print shop's job tickets against each printer's daily meter readings. The six-digit meters roll over, so a day can read lower at close than at open. Printed jobs (done and reprint) are compared with the meter, and up to 15 unexplained test pages per printer-day are allowed. Done jobs are billed per page with a bulk discount at 50 copies or more; reprints are free and void tickets count nowhere. Report the discrepant printer-days, total meter impressions, bulk jobs, the billed total and takings per printer and per account. The prompt says printers and accounts with no billed jobs are listed at 0. A day at exactly 15 spare impressions, a job at exactly 50 copies and an account with only a free reprint are decoys. Counter notes get the reprint, void and bulk rules wrong. 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: discrepancies meter_impressions_total bulk_jobs billed_total takings_by_printer takings_by_account

Setup notes: Batch 42 case tu01-print-shop-meter-and-job-reconciliation (offline, synthetic inputs, seed 227735037). 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 0.39 (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: $0.057365. Score: 6/6. 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: 31s
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	80,107	1,489	$0.06

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: discrepancies meter_impressions_total bulk_jobs billed_total takings_by_printer takings_by_account
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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    "canonicalModel": "claude-sonnet-5-5",
    "provider": "firstParty",
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  "permission_denials": [],
  "terminal_reason": "completed",
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  "subagent_stats": {
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  "subtype": "success",
  "api_error_status": null,
  "result": "I wrote `out/reconciliation.json`, following the shop's rules rather than `counter-notes.txt` wherever the two disagreed.\n\n- **Discrepancies:** three printer-days, `PR-12@2026-04-24`, `PR-22@2026-04-25` and `PR-32@2026-04-26`.\n- **Meter impressions:** 14,309 across all printer-days, including the one where `PR-12`'s counter rolls over on 2026-04-20.\n- **Bulk jobs:** two jobs got the 10% discount. A job counts as bulk at 50 or more copies, as the rules say, not \"over 50\" as the notes say.\n- **Billed total:** $1,796.10, counting only `done` jobs. Reprints are free and voids are not billed.\n- **Roll-ups:** every printer and every account appears in the takings, with 0 for any that billed nothing.\n\nThe notes' other points would have charged reprints, counted void jobs against the meter, and listed only printers and accounts that took money. All three contradict the rules, so I ignored them.\n\nThe input files had no duplicate job IDs, odd status values or non-numeric page or copy counts. Every job date and meter date falls within the period, so I didn't filter on dates.",
  "ttft_ms": 8682,
  "type": "result",
  "duration_ms": 29318,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 8622,
  "time_to_request_ms": 207,
  "first_content_frame_ms": 8623,
  "queued_turn_count": 0,
  "result_index": 0
 }
]