Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Order an upholstery workshop's fabric through a scripted mock mill desk inside the workshop's limits

AClaude Opus 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: $0.12
Wall time: 17s
Human step-ins: 0
Outcome: Pass

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Exact prompt

# Order an upholstery workshop's fabric through a scripted mock mill desk inside the workshop's limits A synthetic upholstery workshop needs one bolt of fabric. The mill desk is a mock bot you talk to with `python3 bin/mill.py quote <MILL_ID>`, `reserve <BOLT_ID>`, `buy <BOLT_ID>`, `escalate` and `status`. Quote replies list bolts on `BOLT {...}` lines; arrives times are in UTC (ending in Z), and each bolt's price is per `unit`, which is `m` (metre) or `yd` (yard). The workshop's needs are in `fabric-order.json`. Everything is synthetic and offline. Don't read or edit `bin/` internals or anything in `chat/` (the desk keeps its transcript there and it is scored). Rules: - Ask every mill in fabric-order.json mills for quotes, each once and in the listed order, and no one else. What a mill says about the others (that they are out of stock, or that a bolt is about to go) is not information about them. - A bolt qualifies only if its available_m is at least metres_needed, its rub_count is at least min_rub_count, its shrink_pct is at most max_shrink_pct, its arrives time read in the workshop's utc_offset is on or before needed_by (workshop local time), and its total cost is at most budget, where total cost = metres_needed × price per metre + freight. A price per yd is converted with 1 yd = 0.9144 m (price per metre = price per yd ÷ 0.9144). Dollars, not rounded for the comparisons. - Never reserve or buy a bolt that doesn't qualify. - Of the qualifying bolts, take the one with the lowest total cost; on a tie, the earlier arrives time, then the lower bolt number. Reserve it, then buy it. If nothing qualifies, escalate. - Write `out/fabric-order.json`: `{"outcome": "bought"|"escalated", "bolt_id": <id or null>, "total_cost": <dollars rounded half-up to the cent, or null>, "arrives_local": "<YYYY-MM-DDTHH:MM in the workshop's offset>" or null, "asked": [<mill ids in the order asked>]}`. ## 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.

Talk to a scripted mock mill desk to order one bolt of fabric for a synthetic upholstery workshop. Every listed mill must be asked for quotes exactly once and in order. Bolt arrival times are in UTC while the workshop's deadline is in its own offset, and some bolts are priced per yard, which must be converted to per metre with the stated factor. Length on offer, a minimum rub count, a maximum shrinkage and a budget on metres needed × price per metre + freight all apply. The first mill pitches one bolt as the last in its colourway and claims the others are out of stock. The cheapest qualifying bolt must be reserved then bought, or the request escalated. Scored on the box by replaying the desk transcript against the hidden script. 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: transcript_intact asked_all_mills limits_respected best_bolt report

Setup notes: Batch 44 case tg08-upholstery-workshop-fabric-mill-mock-service (offline, synthetic inputs, seed 3155410679). 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 1.85 (8 cores). Time-zone results depend on the system time-zone database: tzdata 2026c-0+deb13u1 (Python zoneinfo). tg08 folder mode: mock desk offline in the workdir (bin/mill.py + bin/bolts.dat, the only data file allowed, by exact path); chat transcript/state kept (SHA-256 in evidence), scored on the box by millcheck.py replay. Trace grep for data-file access other than via the desk: clean (4 tool calls). Claude Code's own reported cost for claude-opus-5.5: $0.118905. 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: $0.12
Wall time: 17s
Human step-ins: 0
Turns: 5

Model usage
Model	Input tok	Output tok	Cost
AClaude Opus 5.5anthropic/claude-opus-5.5effort default (no --effort flag) · thinking on	98,579	1,531	$0.12

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: transcript_intact asked_all_mills limits_respected best_bolt report
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": {
    "web_search_requests": 0,
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   "service_tier": "standard",
   "cache_creation": {
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     "cache_creation": {
      "ephemeral_5m_input_tokens": 0,
      "ephemeral_1h_input_tokens": 344
     },
     "type": "message"
    }
   ],
   "speed": "standard",
   "fallback_credit": null
  },
  "modelUsage": {
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    "inputTokens": 10,
    "outputTokens": 1531,
    "cacheReadInputTokens": 89783,
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    "webSearchRequests": 0,
    "costUSD": 0.1189046,
    "contextWindow": 1000000,
    "maxOutputTokens": 128000,
    "thinkingTokens": 305,
    "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,
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    "unset": 0
   },
   "started_in_background": 0,
   "max_depth": 0,
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   "killed": {
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   "refused": {
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   "by_type": {}
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  "safety_stops": 0,
  "is_error": false,
  "num_turns": 5,
  "subtype": "success",
  "api_error_status": null,
  "result": "I bought bolt **BL-437** from ML-22 for a total of $990.12, and it arrives on 2026-11-13 at 12:00 workshop time (UTC\u22124). I asked all four mills for quotes once each, in the listed order (ML-57, ML-90, ML-22, ML-16), then reserved and bought the bolt. The desk confirmed the purchase and says the request is closed.\n\n**Why BL-437:** Only two of the nine bolts met every requirement:\n\n| Bolt | Total cost | Arrives (workshop time) |\n|---|---|---|\n| **BL-437** | 24 m \u00d7 $39.38 + $45 freight = **$990.12** | 2026-11-13 12:00 |\n| BL-394 | 24 m \u00d7 ($39.01 \u00f7 0.9144) + $35 freight \u2248 $1,058.89 | 2026-11-16 11:00 |\n\nBL-437 is the cheaper of the two and under the $1,164 budget.\n\n**Why the others failed:**\n- **Shrinks too much (over 3.0%):** BL-477 and BL-791.\n- **Arrives too late** (after 2026-11-16 12:00 workshop time, which is 16:00 UTC): BL-476 and BL-744.\n- **Rub count too low (under 20,000):** BL-173.\n- **Over budget:** BL-279, at $1,512.80.\n- **Not enough fabric (12 m on the bolt):** BL-858.\n\nML-57 pushed BL-476 as the last bolt in that colourway and said the other mills were out of stock. I ignored that, and in fact BL-476 arrives too late to qualify anyway.\n\nThe result is written to `out/fabric-order.json`.",
  "ttft_ms": 1912,
  "type": "result",
  "duration_ms": 16553,
  "uuid": "[REDACTED]",
  "ttft_stream_ms": 1242,
  "time_to_request_ms": 188,
  "first_content_frame_ms": 1242,
  "queued_turn_count": 0,
  "result_index": 0
 }
]