Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Work out a dental clinic's insurance estimates and patient balances from coverage classes, deductibles and annual maximums

AClaude Sonnet 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-25 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first tryCompare

Estimated cost: $0.05
Wall time: 12s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Work out a dental clinic's insurance estimates and patient balances from coverage classes, deductibles and annual maximums Inputs: `patients.csv` (patient_id, account_id, plan, deductible_left, annual_max_left), `fee-schedule.json` (per procedure: fee, class), `plans.json` (per plan: the percent it pays for preventive, basic and major work) and `treatments.csv` (line_id, patient_id, date, procedure, tooth). All patients and accounts are synthetic; amounts are in dollars. These rules are the clinic's policy; where `front-desk-note.txt` disagrees, the rules win. Rules: - Order: work through each patient's treatment lines by date, and by line_id within a date (the file is not in that order); each line uses what is left of the patient's deductible and annual maximum after the earlier lines. - Deductible: on basic and major lines only, take what is left of the patient's deductible off the fee (at most the whole fee) before coverage; preventive lines never use the deductible. - Coverage: insurer share = (fee − deductible taken) × the plan's percent for the line's class, rounded half-up to the cent, but never more than the patient's annual maximum still left; whatever the insurer pays comes off the annual maximum left. Patient share = fee − insurer share. - Write `out/estimate.json`: `{"lines": {"<line_id>": {"deductible": <dollars>, "insurer": <dollars>, "patient": <dollars>}, ...}, "patients": {"<patient_id>": {"insurer": <sum>, "patient": <sum>, "max_left": <annual maximum left after all lines>}, ...}, "accounts": {"<account_id>": <sum of its patients' patient shares>, ...}}`. ## 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 synthetic dental clinic's treatment lines into insurer and patient shares. Each plan pays a different percent for preventive, basic and major work, the deductible applies only to basic and major lines, the annual maximum caps what the insurer pays, and lines must be worked through in date order although the file is shuffled. A front-desk note gets the order, deductible and maximum 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: deductible line_shares annual_maximum patient_totals account_balances

Setup notes: Batch 38 case tz01-dental-insurance-estimates (offline, synthetic inputs, seed 55911842). 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 0.59 (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: $0.052936. 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: 12s
Human step-ins: 0
Turns: 3

Model usage
Model	Input tok	Output tok	Cost
AClaude Sonnet 5.5anthropic/claude-sonnet-5.5effort default (no --effort flag) · thinking on	58,935	1,493	$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: deductible line_shares annual_maximum patient_totals account_balances
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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  "subagent_stats": {
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  "result": "I wrote `out/estimate.json` with per-line, per-patient and per-account figures. I ran the script once and haven't checked the output beyond the summary it printed.\n\nI ignored `front-desk-note.txt`, as the task says to. Its three instructions conflict with the policy rules, so I applied the policy:\n- **Order:** I processed lines by date, then by line_id, not as printed in the file.\n- **Deductible:** Preventive lines don't use it.\n- **Annual maximum:** I capped each insurer share at the maximum still left.\n\nPer-patient totals:\n\n| Patient | Insurer | Patient | Annual max left |\n|---|---|---|---|\n| PT-2100 | 107.20 | 26.80 | 192.80 |\n| PT-2113 | 300.00 | 812.42 | 0.00 |\n| PT-2126 | 134.00 | 0.00 | 166.00 |\n| PT-2139 | 721.55 | 891.98 | 178.45 |\n| PT-2152 | 96.73 | 0.00 | 803.27 |\n\nAccount balances (sum of their patients' patient shares):\n- AC-5032: 918.78\n- AC-5011: 812.42\n- AC-5018: 0.00\n- AC-5025: 0.00\n\nPT-2113 hits the annual maximum, so the insurer pays only 300.00 and the patient owes the rest.",
  "ttft_ms": 1845,
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  "uuid": "[REDACTED]",
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 }
]