Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Quote and choose parcel carriers for a batch of shipments under each carrier's own rules

AClaude Opus 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-24 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first tryCompare

Estimated cost: $0.18
Wall time: 32s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Quote and choose parcel carriers for a batch of shipments under each carrier's own rules Inputs: `carriers.json` (each carrier's dimensional divisor, weight rounding, billing method, zones, rate bands and surcharges) and `shipments.csv` (shipment_id, piece, dest_postcode, dims_cm as "a x b x c" in any order, actual_kg). Everything is synthetic. `carriers.json` and these rules are the record; where `dispatch-note.txt` disagrees, the rules win. Rules: - A piece's chargeable weight with a carrier is the larger of actual_kg and a × b × c / dim_divisor, rounded up to the next multiple of the carrier's round_kg. - The zone is the one for the longest prefix in zones that the postcode starts with (compare in capitals without spaces). The base comes from the first band whose max_kg is at least the weight; above the last band it is the last band's price plus per_kg_above × the kg over its max_kg. billing per_piece prices each piece's chargeable weight separately and adds them; billing consignment prices the sum of the pieces' chargeable weights once. - Oversize applies per piece when its longest side is more than longest_cm, or its longest side plus twice the sum of the other two sides is more than length_plus_girth_cm. The remote fee applies once per shipment when the postcode starts with any remote prefix. - Fuel is fuel_pct of the sum of the charge types listed in fuel_applies_to (base, oversize, remote), rounded half-up to the cent. The total is base + oversize fees + remote fee + fuel. - A carrier can't take a shipment if any piece's actual_kg is above its max_piece_kg; its quote is then null. - Choose the cheapest carrier for each shipment; on a tie take the carrier listed first in carriers.json (null if no carrier can take it). - Write `out/quotes.json`: `{"chargeable_kg": {"<shipment_id>": {"<carrier>": [<kg per piece in piece order>], ...}, ...}, "base": {"<shipment_id>": {"<carrier>": <base or null>, ...}, ...}, "quotes": {"<shipment_id>": {"<carrier>": <total or null>, ...}, ...}, "chosen": {"<shipment_id>": "<carrier>", ...}}`. ## 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.

Price a batch of synthetic multi-piece shipments with three carriers and choose the cheapest. Each carrier has its own dimensional divisor, round-up step and maximum piece weight; zones come from the longest postcode prefix; one carrier bills the whole consignment while the others bill per piece; bands run out and switch to a per-kg rate; oversize is judged per piece by length and girth; the remote fee applies once; and fuel is charged on different parts of the bill for each carrier. A dispatch note gets the billing, rounding, fuel and choice 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: chargeable_weight zones_bands_billing surcharges_and_fuel eligibility choice

Setup notes: Batch 33 case tj03-parcel-carrier-quotes (offline, synthetic inputs, seed 2220326865). 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 0.21 (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: $0.179145. 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: $0.18
Wall time: 32s
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	88,491	3,096	$0.18

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: chargeable_weight zones_bands_billing surcharges_and_fuel eligibility choice
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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  "session_id": "[REDACTED]",
  "total_cost_usd": 0.17914539999999998,
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   "output_tokens_details": {
    "thinking_tokens": 449
   },
   "server_tool_use": {
    "web_search_requests": 0,
    "web_fetch_requests": 0
   },
   "service_tier": "standard",
   "cache_creation": {
    "ephemeral_1h_input_tokens": 12756,
    "ephemeral_5m_input_tokens": 0
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   "inference_geo": "global",
   "iterations": [
    {
     "input_tokens": 2,
     "output_tokens": 759,
     "cache_read_input_tokens": 23902,
     "cache_creation_input_tokens": 1000,
     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 1000
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
   "claude-opus-5-5": {
    "inputTokens": 8,
    "outputTokens": 3096,
    "cacheReadInputTokens": 75727,
    "cacheCreationInputTokens": 12756,
    "webSearchRequests": 0,
    "costUSD": 0.17914539999999998,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 449,
    "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,
   "max_depth": 0,
   "spawned_by_subagents": 0,
   "completed": 0,
   "failed": 0,
   "killed": {
    "parent": 0,
    "user": 0,
    "system": 0
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   "refused": {
    "depth_limit": 0,
    "concurrency_limit": 0,
    "budget": 0
   },
   "by_type": {}
  },
  "safety_stops": 0,
  "is_error": false,
  "num_turns": 4,
  "subtype": "success",
  "api_error_status": null,
  "result": "I wrote `out/quotes.json`, which quotes all 8 shipments against the three carriers. I calculated it once with exact arithmetic and spot-checked a few results by hand, such as SH-101 with Parcelwise; there was no reference output to compare against.\n\n| Shipment | Chosen | Total |\n|---|---|---|\n| SH-101 | Quickcrate | 31.72 |\n| SH-102 | Parcelwise | 16.36 |\n| SH-103 | Parcelwise | 44.91 |\n| SH-104 | Northlink | 80.755 |\n| SH-105 | Parcelwise | 27.75 |\n| SH-106 | Northlink | 32.38 |\n| SH-107 | Northlink | 63.36 |\n| SH-108 | Northlink | 30.25 |\n\n- **Rules followed over the dispatch note:** I used `carriers.json` and the task rules wherever `dispatch-note.txt` disagreed. Weights round up to each carrier's `round_kg` (not to the nearest kilo), and each carrier keeps its own billing method. Fuel applies only to that carrier's listed charges, and the choice is the lowest total, not the lowest base rate.\n- **Quickcrate can't take SH-103, SH-104 or SH-105:** each has a piece over Quickcrate's 25 kg limit, so its base and quote are null for those shipments.\n- **Chargeable weights for those three:** I still listed Quickcrate's chargeable kg per piece, because the output format doesn't allow null there. If the checker expects null instead, those three entries will fail.\n- **Unrounded totals:** base and total are left unrounded where the rates make them land between cents (e.g. SH-104 Northlink 80.755). Only fuel is rounded, because the rules only say to round fuel.\n- **Postcode matching:** \"TR21 0HE\" falls in zone C through the \"TR2\" prefix and also counts as remote (\"TR21\") for Parcelwise and Northlink. \"TR1 2AB\" falls back to the default zone A.\n\nThe script that produced the file is `../scripts/q.py`, kept outside `out/`.",
  "ttft_ms": 3463,
  "type": "result",
  "duration_ms": 30160,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 2964,
  "time_to_request_ms": 1570,
  "first_content_frame_ms": 2965,
  "queued_turn_count": 0,
  "result_index": 0
 }
]