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GPT-6.1 Sol (effort default (no reasoning-effort override) · thinking off) on Work out a care home's fortnightly pay from shifts that span the night the clocks go back

OGPT-6.1 Soldefault · thinking off · Codex CLI 0.163.0 (codex exec --json) · cloud · 2026-10-23 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first try
Estimated cost
$0.03
Wall time
35s
Human step-ins
0
Outcome
Pass

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Summary

Exact prompt

# Work out a care home's pay for two weeks of shifts Inputs: `shifts.csv` (shift_id, worker_id, start, end, status), `workers.csv` (worker_id, name, hourly_rate), `pay-rules.json` and `rota-note.txt`. Amounts are in pounds. `pay-rules.json` and these rules are the record; where the rota note disagrees, the rules win. Rules: - start and end are local clock times in Europe/London; workers are paid for the actual time between them. - Shifts whose status is cancelled are not paid. - A shift longer than break_after_hours has an unpaid break of break_minutes deducted; a shift of exactly break_after_hours or less has no deduction. - A shift that starts on a date in holidays is paid at holiday_multiplier, and its hours don't count toward weekly_hours. - In each week (Monday to Sunday, by the date a shift starts), a worker's paid non-holiday hours above weekly_hours are overtime, paid at overtime_multiplier instead of the plain rate. - Write `out/payroll.json`: `{"paid_hours": {"<shift_id>": <hours after any break>, ...}, "overtime_hours": {"<worker_id>": <overtime hours over both weeks>, ...}, "pay": {"<worker_id>": <pay>, ...}, "total": <sum of pay>}`. `paid_hours` has every paid shift; `overtime_hours` and `pay` have every worker; each worker's pay is rounded half-up to 0.01 once, at the end. ## 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.

Original benchmark task written for usecaserank.com. Headless, offline run on a reproducible fixture. Cost shown is a list-price API-equivalent estimate (run on a ChatGPT subscription, not billed).

Success criteria: actual_hours breaks overtime pay

Setup notes: batch29 case h03-care-home-timesheets (offline fixture). Prepared with batch29/prepare.sh on the shared box; only TASK.md + starting files were copied to the agent machine, hidden key/tests stayed on the box. Prompt = TASK.md verbatim on stdin. Flags: --json -s workspace-write --skip-git-repo-check --ephemeral --ignore-user-config --ignore-rules -C <workdir>. Scored on the box with the scout's scorer: `python3 score.py WORKDIR KEYDIR`. Single run, no retries. User-level AGENTS.md (846 bytes, sha256 83ec4fe50da8) may have been in context; --ignore-user-config does not document excluding it. Autonomous case (seed 1630817727): no stand-in user; any ask/ file counts as an intervention and blocks a pass. Serving model not confirmed: requested via -m; the event log does not echo the serving model id. Price source is secondary (pricing.json verification='secondary', https://www.actuia.com/en/news/ai-api-pricing-in-october-2026-050-to-50-for-output/), not an official OpenAI price page. Score: 4/4. Cost is an ESTIMATE: measured tokens x pricing.json list price (ChatGPT plan, nothing billed); input_tokens include cached reads; output_tokens include reasoning tokens. Tool calls 3 (0 failed, recovered). Single run.

Estimated cost List-price estimate; not actually billed.

Metrics

Estimated cost
$0.03
Wall time
35s
Human step-ins
0
Turns
1
Model usage
ModelInput tokOutput tokCost
OGPT-6.1 Solopenai/gpt-6.1-soleffort default (no reasoning-effort override) · thinking off67,453798$0.03

Reproduce this run

  1. Use the use case prompt on the use case page.
  2. Same setup: GPT-6.1 Sol (openai/gpt-6.1-sol, effort default (no reasoning-effort override) · thinking off) via Codex CLI 0.163.0 (codex exec --json), cloud.
  3. It counts as a success only if it meets every success criterion: actual_hours breaks overtime pay
  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
{"type": "thread.started", "thread_id": "01a16830-ceb1-7dc2-84f3-1f82651a7254"}
{"type": "turn.started"}
{"type": "item.completed", "item": {"id": "item_0", "type": "agent_message", "text": "I\u2019ll read the inputs, calculate hours using Europe/London\u2019s clock changes, and write `out/payroll.json`.\n"}}
{"type": "item.started", "item": {"id": "item_1", "type": "command_execution", "command": "/bin/bash -lc \"pwd && rg --files -g 'shifts.csv' -g 'workers.csv' -g 'pay-rules.json' -g 'rota-note.txt' -g 'AGENTS.md'\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_1", "type": "command_execution", "command": "/bin/bash -lc \"pwd && rg --files -g 'shifts.csv' -g 'workers.csv' -g 'pay-rules.json' -g 'rota-note.txt' -g 'AGENTS.md'\"", "aggregated_output": "/home/bob/usecase-runs/b2930/out/codex/gpt-6.1-sol/b29h03/work\nshifts.csv\nworkers.csv\npay-rules.json\nrota-note.txt\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat pay-rules.json rota-note.txt workers.csv shifts.csv'", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat pay-rules.json rota-note.txt workers.csv shifts.csv'", "aggregated_output": "{\n \"weekly_hours\": 40,\n \"overtime_multiplier\": \"1.5\",\n \"holiday_multiplier\": \"2\",\n \"break_after_hours\": 6,\n \"break_minutes\": 30,\n \"holidays\": [\n  \"2026-10-23\"\n ]\n}Rota note: pay the hours shown on the rota (end minus start).\nAnyone on six hours or more takes the half-hour break. Holiday shifts count toward the 40 like any other.\nworker_id,name,hourly_rate\r\nCW-50,Amara,12.40\r\nCW-55,Bogdan,12.40\r\nCW-57,Cerys,12.60\r\nCW-61,Femi,14.20\r\nshift_id,worker_id,start,end,status\r\nSH-929,CW-50,2026-10-31T08:00,2026-10-31T16:30,worked\r\nSH-968,CW-57,2026-10-27T07:30,2026-10-27T19:00,worked\r\nSH-937,CW-55,2026-10-21T08:00,2026-10-21T16:00,worked\r\nSH-919,CW-50,2026-10-22T14:00,2026-10-22T21:00,worked\r\nSH-959,CW-57,2026-10-23T09:00,2026-10-23T15:00,worked\r\nSH-1004,CW-50,2026-10-24T22:00,2026-10-25T06:00,worked\r\nSH-965,CW-57,2026-10-25T08:00,2026-10-25T16:00,worked\r\nSH-993,CW-61,2026-10-28T08:00,2026-10-28T16:00,worked\r\nSH-973,CW-57,2026-10-29T08:00,2026-10-29T15:30,worked\r\nSH-966,CW-57,2026-10-26T08:00,2026-10-26T15:30,worked\r\nSH-924,CW-50,2026-10-27T08:00,2026-10-27T16:00,worked\r\nSH-977,CW-61,2026-10-20T14:00,2026-10-20T22:00,worked\r\nSH-945,CW-55,2026-10-30T14:00,2026-10-30T22:00,worked\r\nSH-975,CW-61,2026-10-19T09:00,2026-10-19T15:00,worked\r\nSH-938,CW-55,2026-10-22T09:00,2026-10-22T15:00,worked\r\nSH-998,CW-61,2026-10-30T09:00,2026-10-30T15:00,worked\r\nSH-932,CW-50,2026-11-01T07:30,2026-11-01T19:00,worked\r\nSH-921,CW-50,2026-10-23T07:30,2026-10-23T19:30,worked\r\nSH-943,CW-55,2026-10-29T08:00,2026-10-29T16:30,worked\r\nSH-981,CW-61,2026-10-21T09:00,2026-10-21T15:00,worked\r\nSH-1001,CW-61,2026-10-31T07:30,2026-10-31T19:30,worked\r\nSH-956,CW-57,2026-10-21T08:00,2026-10-21T16:30,worked\r\nSH-954,CW-57,2026-10-19T08:00,2026-10-19T16:00,worked\r\nSH-916,CW-50,2026-10-21T09:00,2026-10-21T15:00,worked\r\nSH-925,CW-50,2026-10-28T14:00,2026-10-28T22:00,worked\r\nSH-984,CW-61,2026-10-24T07:30,2026-10-24T19:00,worked\r\nSH-961,CW-57,2026-10-24T07:30,2026-10-24T19:30,worked\r\nSH-951,CW-55,2026-11-01T08:00,2026-11-01T15:30,worked\r\nSH-935,CW-55,2026-10-20T08:00,2026-10-20T15:30,worked\r\nSH-947,CW-55,2026-10-31T07:30,2026-10-31T19:30,worked\r\nSH-990,CW-61,2026-10-27T09:00,2026-10-27T15:00,worked\r\nSH-969,CW-57,2026-10-28T08:00,2026-10-28T15:30,worked\r\nSH-939,CW-55,2026-10-26T07:30,2026-10-26T19:30,worked\r\nSH-909,CW-50,2026-10-19T08:00,2026-10-19T16:00,worked\r\nSH-912,CW-50,2026-10-20T08:00,2026-10-20T15:30,worked\r\nSH-982,CW-61,2026-10-23T08:00,2026-10-23T16:00,worked\r\nSH-994,CW-61,2026-10-29T09:00,2026-10-29T15:00,worked\r\nSH-926,CW-50,2026-10-29T08:00,2026-10-29T16:30,worked\r\nSH-1005,CW-55,2026-10-24T22:00,2026-10-25T06:30,worked\r\nSH-986,CW-61,2026-10-26T09:00,2026-10-26T15:00,worked\r\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"mkdir -p out\npython - <<'PY'\nimport csv,json\nfrom decimal import Decimal as D, ROUND_HALF_UP\nfrom datetime import datetime,timedelta,timezone\nfrom zoneinfo import ZoneInfo\nfrom collections import defaultdict\nfrom pathlib import Path\nrules=json.load(open('pay-rules.json'),parse_float=D)\nworkers={r['worker_id']:D(r['hourly_rate']) for r in csv.DictReader(open('workers.csv'))}\nweekly=defaultdict(lambda:D(0)); holiday=defaultdict(lambda:D(0)); paid={}\nzone=ZoneInfo('Europe/London')\nfor s in csv.DictReader(open('shifts.csv')):\n    if s['status'].lower()=='cancelled': continue\n    start=datetime.fromisoformat(s['start']).replace(tzinfo=zone)\n    end=datetime.fromisoformat(s['end']).replace(tzinfo=zone)\n    delta=end.astimezone(timezone.utc)-start.astimezone(timezone.utc)\n    hours=D(delta.days*86400+delta.seconds)/D(3600)\n    if hours>D(rules['break_after_hours']): hours-=D(rules['break_minutes'])/D(60)\n    paid[s['shift_id']]=float(hours)\n    w=s['worker_id']\n    if start.date().isoformat() in rules['holidays']: holiday[w]+=hours\n    else: weekly[w,start.date()-timedelta(days=start.weekday())]+=hours\nots={};pay={}\nfor w,rate in workers.items():\n    ot=sum((max(D(0),h-D(rules['weekly_hours'])) for (worker,week),h in weekly.items() if worker==w),D(0))\n    normal=sum((h for (worker,week),h in weekly.items() if worker==w),D(0))\n    amount=rate*(normal+ot*(D(rules['overtime_multiplier'])-1)+holiday[w]*D(rules['holiday_multiplier']))\n    ots[w]=float(ot);pay[w]=float(amount.quantize(D('.01'),rounding=ROUND_HALF_UP))\nresult={'paid_hours':paid,'overtime_hours':ots,'pay':pay,'total':float(sum((D(str(v)) for v in pay.values()),D(0)))}\nPath('out/payroll.json').write_text(json.dumps(result,indent=2)+'\\\\n')\nassert len(paid)==40\nprint(json.dumps({'weekly_non_holiday_hours':{f'{w} {week}':str(h) for (w,week),h in sorted(weekly.items())},'overtime_hours':ots,'pay':pay,'total':result['total']},indent=2))\nPY\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"mkdir -p out\npython - <<'PY'\nimport csv,json\nfrom decimal import Decimal as D, ROUND_HALF_UP\nfrom datetime import datetime,timedelta,timezone\nfrom zoneinfo import ZoneInfo\nfrom collections import defaultdict\nfrom pathlib import Path\nrules=json.load(open('pay-rules.json'),parse_float=D)\nworkers={r['worker_id']:D(r['hourly_rate']) for r in csv.DictReader(open('workers.csv'))}\nweekly=defaultdict(lambda:D(0)); holiday=defaultdict(lambda:D(0)); paid={}\nzone=ZoneInfo('Europe/London')\nfor s in csv.DictReader(open('shifts.csv')):\n    if s['status'].lower()=='cancelled': continue\n    start=datetime.fromisoformat(s['start']).replace(tzinfo=zone)\n    end=datetime.fromisoformat(s['end']).replace(tzinfo=zone)\n    delta=end.astimezone(timezone.utc)-start.astimezone(timezone.utc)\n    hours=D(delta.days*86400+delta.seconds)/D(3600)\n    if hours>D(rules['break_after_hours']): hours-=D(rules['break_minutes'])/D(60)\n    paid[s['shift_id']]=float(hours)\n    w=s['worker_id']\n    if start.date().isoformat() in rules['holidays']: holiday[w]+=hours\n    else: weekly[w,start.date()-timedelta(days=start.weekday())]+=hours\nots={};pay={}\nfor w,rate in workers.items():\n    ot=sum((max(D(0),h-D(rules['weekly_hours'])) for (worker,week),h in weekly.items() if worker==w),D(0))\n    normal=sum((h for (worker,week),h in weekly.items() if worker==w),D(0))\n    amount=rate*(normal+ot*(D(rules['overtime_multiplier'])-1)+holiday[w]*D(rules['holiday_multiplier']))\n    ots[w]=float(ot);pay[w]=float(amount.quantize(D('.01'),rounding=ROUND_HALF_UP))\nresult={'paid_hours':paid,'overtime_hours':ots,'pay':pay,'total':float(sum((D(str(v)) for v in pay.values()),D(0)))}\nPath('out/payroll.json').write_text(json.dumps(result,indent=2)+'\\\\n')\nassert len(paid)==40\nprint(json.dumps({'weekly_non_holiday_hours':{f'{w} {week}':str(h) for (w,week),h in sorted(weekly.items())},'overtime_hours':ots,'pay':pay,'total':result['total']},indent=2))\nPY\"", "aggregated_output": "{\n  \"weekly_non_holiday_hours\": {\n    \"CW-50 2026-10-19\": \"35.5\",\n    \"CW-50 2026-10-26\": \"42.0\",\n    \"CW-55 2026-10-19\": \"29.5\",\n    \"CW-55 2026-10-26\": \"45.5\",\n    \"CW-57 2026-10-19\": \"34.5\",\n    \"CW-57 2026-10-26\": \"32.0\",\n    \"CW-61 2026-10-19\": \"30.5\",\n    \"CW-61 2026-10-26\": \"43.0\"\n  },\n  \"overtime_hours\": {\n    \"CW-50\": 2.0,\n    \"CW-55\": 5.5,\n    \"CW-57\": 0.0,\n    \"CW-61\": 3.0\n  },\n  \"pay\": {\n    \"CW-50\": 1258.6,\n    \"CW-55\": 964.1,\n    \"CW-57\": 989.1,\n    \"CW-61\": 1278.0\n  },\n  \"total\": 4489.8\n}\n", "exit_code": 0, "status": "completed"}}
{"type": "item.completed", "item": {"id": "item_4", "type": "agent_message", "text": "Created [out/payroll.json](out/payroll.json) with all 40 paid shifts, accounting for the clock change, breaks, holiday pay, and weekly overtime.\n\nTotal pay: **\u00a34,489.80**."}}
{"type": "turn.completed", "usage": {"input_tokens": 67453, "cached_input_tokens": 61568, "cache_write_input_tokens": 0, "output_tokens": 798, "reasoning_output_tokens": 0}}

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