Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Decide which ride offers a driver should accept from their own trip history, costs and stated rules

AClaude Opus 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: $0.15
Wall time: 27s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Decide which ride offers a driver should accept from their own trip history, costs and stated rules Inputs: `trips.csv` (the driver's own past trips: trip_id, date, pickup_min, trip_min, pickup_miles, trip_miles, fare, tip), `offers.json` (tonight's incoming offers in the order they arrive: id, offered_at HH:MM, pickup_min, pickup_miles, trip_min, trip_miles, fare, surge, dropoff_zone) and `driver-rules.json` (cost_per_mile, min_rate_pct, max_pickup_miles, surge_relax_at, surge_extra_pickup_miles, min_net_per_mile, shift_end HH:MM on the same evening, possibly 24:00, end_window_min, home_zones). All trips, offers and places are synthetic; amounts are in dollars. These are the driver's own rules; where `forum-tips.txt` disagrees, the rules win. Rules: - Baseline rate: from trips.csv, (sum of fare + tip − cost_per_mile × sum of pickup_miles + trip_miles) ÷ (sum of pickup_min + trip_min ÷ 60), rounded half-up to the cent. The hourly bar is baseline rate × min_rate_pct ÷ 100, rounded half-up to the cent. - Offer money: gross = fare × surge, rounded half-up to the cent. Net = gross − cost_per_mile × (pickup_miles + trip_miles), rounded half-up to the cent. Net per hour = net ÷ ((pickup_min + trip_min) ÷ 60) and net per mile = net ÷ (pickup_miles + trip_miles), each rounded half-up to the cent. Compare the rounded values. - Decide each offer in arrival order and give the first reason that applies: busy (it arrives before the previously accepted trip ends; a trip ends at offered_at + pickup_min + trip_min), past_shift_end (it would end after shift_end), end_of_shift_zone (it would end at or after shift_end − end_window_min minutes, and dropoff_zone is not in home_zones), deadhead (pickup_miles is above max_pickup_miles, or above max_pickup_miles + surge_extra_pickup_miles when surge is at least surge_relax_at), per_hour (net per hour is below the hourly bar), per_mile (net per mile is below min_net_per_mile). If none applies, accept with reason accept. - Write `out/decisions.json`: `{"baseline_rate": <dollars per hour>, "hourly_bar": <dollars per hour>, "offers": {"<id>": {"decision": "accept"|"decline", "reason": "<reason>", "net": <dollars>, "net_per_hour": <dollars>}, ...}, "accepted": [<ids in arrival order>], "accepted_net_total": <dollars>}`. ## 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.

Screen a synthetic evening of ride offers for a driver. The driver's own baseline hourly rate comes from their past trips after per-mile costs, including the unpaid drive to each pickup. Each offer is priced with surge and costs, then accepted or declined by the driver's rules in order: already busy, past the shift end, ending near the shift end outside home zones, too far to the pickup (relaxed under high surge), below the hourly bar, below the per-mile floor. A forum-tips file gets the costs, stacking and rate 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: baseline_rate offer_money decisions accepted_total

Setup notes: Batch 37 case ty03-rideshare-offer-acceptance (offline, synthetic inputs, seed 1436120811). 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 0.46 (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-opus-5.5: $0.15199. 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: $0.15
Wall time: 27s
Human step-ins: 0
Turns: 4

Model usage
Model	Input tok	Output tok	Cost
AClaude Opus 5.5anthropic/claude-opus-5.5effort default (no --effort flag) · thinking on	84,671	2,370	$0.15

Reproduce this run

Use the use case prompt on the use case page.
Same setup: Claude Opus 5.5 (anthropic/claude-opus-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: baseline_rate offer_money decisions accepted_total
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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   "output_tokens_details": {
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   "server_tool_use": {
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   "service_tier": "standard",
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     "type": "message"
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   "speed": "standard",
   "fallback_credit": null
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  "modelUsage": {
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    "costUSD": 0.15198979999999998,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 187,
    "canonicalModel": "claude-opus-5-5",
    "provider": "firstParty",
    "costBasis": "list"
   }
  },
  "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,
    "unset": 0
   },
   "started_in_background": 0,
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   "spawned_by_subagents": 0,
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   "killed": {
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   "by_type": {}
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  "safety_stops": 0,
  "is_error": false,
  "num_turns": 4,
  "subtype": "success",
  "api_error_status": null,
  "result": "I've written `out/decisions.json`. Of tonight's 13 offers, the driver should accept 4: OF700, OF707, OF742 and OF770, for a total net of **$140.51**.\n\nFrom the 18 past trips, the baseline rate is **$53.24/hr**. At 110% that sets the hourly bar at **$58.56/hr**.\n\n| Offer | Decision | Reason | Net | Net/hr |\n|---|---|---|---|---|\n| OF700 | accept | \u2013 | 26.25 | 75.00 |\n| OF707 | accept | \u2013 | 51.60 | 59.54 |\n| OF714 | decline | busy | 22.44 | 43.43 |\n| OF721 | decline | busy | 10.27 | 28.01 |\n| OF728 | decline | busy | 90.67 | 120.89 |\n| OF735 | decline | per_hour | 13.23 | 37.80 |\n| OF742 | accept | \u2013 | 33.73 | 74.96 |\n| OF749 | decline | busy | 18.98 | 39.27 |\n| OF756 | decline | deadhead | 12.79 | 40.39 |\n| OF763 | decline | deadhead | 20.47 | 53.40 |\n| OF770 | accept | \u2013 | 28.93 | 82.66 |\n| OF777 | decline | deadhead | 45.70 | 88.45 |\n| OF784 | decline | end_of_shift_zone | 40.98 | 45.53 |\n\nHow I read the rules:\n- **Formulas:** I took the baseline and per-hour formulas to mean total minutes (pickup plus trip) \u00f7 60 and total miles (pickup plus trip).\n- **Busy:** this only counts against the last accepted trip. An offer is busy if it arrives strictly before that trip ends. OF749 is busy because it arrives at 20:59 and OF742 ends at 21:00.\n- **Forum tips:** I ignored them, as instructed. They say to leave out pickup miles, to take every ping, and to average per-trip rates, and the driver's rules disagree on all three.\n\nOF728 is the best offer of the night at $120.89/hr, but it was declined only because OF707 was still in progress. Its pickup is also 4.1 miles. That would have been allowed, since the surge was high enough to raise the limit to 4.5 miles.\n\nI worked in exact decimals and rounded half-up at each step the rules specify. The script is at `/tmp/s/run.py`, outside `out/`, and I ran it once.",
  "ttft_ms": 2825,
  "type": "result",
  "duration_ms": 26235,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 1750,
  "time_to_request_ms": 155,
  "first_content_frame_ms": 1751,
  "queued_turn_count": 0,
  "result_index": 0
 }
]