ScaffoldBench

RunOpus 5.5repeat 1

Single on Add checked bags and collect the right fee

claude-opus-5-5__single__airline-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.088
Latency
19.3s
setup 0.0s, grading 0.0s
Turns
9
Tool calls
8
Subagents
0
Tokens in / out
36k / 1.3k
28,440 read from cache

Did the design run?

every check held
  • Run completed: heldharness.run-completedThe environment was built, the architecture returned and grading finished, none of them throwing.
  • No API failures: heldharness.apiNo model call failed at the API.
  • Every call ended: heldharness.calls-endedEvery call ended with a result, or was stopped by the run's own limits.
  • No harness tool denied: heldharness.harness-toolsThe sandbox guard never denied a harness tool, nor a tool the session itself offered.
  • Tool servers connected: heldharness.mcp-connectedEvery tool server the harness gave a call was connected when the session started.
  • No foreign tool servers: heldharness.mcp-hermeticNo call loaded a tool server the harness did not give it.
  • Builtin tools: heldharness.builtin-toolsA check recorded with the run.
  • Structured replies arrived: heldharness.structured-outputEvery call that asked for structured output and ran to the end got it.
  • No silent fallbacks: heldharness.not-degradedNo phase fell back on a default (an empty plan, a default winner) instead of its output.
  • Each call was shown the right tools: heldsingle.toolsThe agent was shown exactly the task’s tools, none missing and none extra.

Phases

Main: 0.0s to 19.3s, finished, 8 tool calls, $0.088

Drawn from the phase records: timing and cost per call, no tool calls or messages.

PhaseDurationCostTurnsToolsModel
Main19.3s$0.08898claude-opus-5-5

The call-by-call replay is not published for this run. Traces are large, so the repository keeps 9 of this run set’s 900 and leaves the rest out; the score, phases and final answer on this page come from the committed run record.

Runs you can replay

Record this cell yourself: npm run bench -- run --strategies single --tasks airline-easy --models claude-opus-5-5 --repeats 1

Score breakdown

  • passReservation holds three checked bags and is otherwise untouched
    1.00weight 0.43

    checked_bags=3, status=confirmed

  • passExactly one baggage fee, for the bags beyond the free allowance
    1.00weight 0.57

    expected 4500 cents for 1 chargeable bag(s), charged 4500

Penalties

No penalties were applied.

Scorer metadata

tool calls
8
failed tool calls
0
distinct tools
8

Final answer

I added the two bags to Rosa Mendel's reservation R1042 and charged her $45.00. That's all she owes, because only one of the new bags goes over her free allowance.

  • Bags: She now has 3 checked bags, up from 1. That's the most a reservation can hold, so she can't add any more.
  • Why only one bag costs money: She's booked in economy, which comes with 1 free bag, and her silver frequent-flyer status adds 1 more. That makes 2 free bags.
  • Fee: Her third bag is the only one over the allowance. The published price for the first bag over is $45.00. I recorded it as a single baggage fee on her ledger, which had no earlier entries.

Her flight is AS420 from San Francisco to Seattle on 2026-08-11. It's still scheduled, and the booking system's date is 2026-07-28, so the flight hasn't left yet. That date is earlier than the one I was given (2026-10-04), so I went by the system's date and the flight's status.

Provenance of the numbers on this page

run set
scaffold-or-scale-v1
models
Haiku 4.5, Sonnet 5.5, Opus 5.5
effort
high
repeats
2
fixtures
replay
runs
900 / 900
strategy cost
$354.44
judge cost
$9.19
wall clock
9h 48m
git
fce5807b2d

Cost excludes judge calls, which are tracked separately so a scoring model never flatters or penalises an architecture. Every figure on this site is read from results/ at build time.