ScaffoldBench

RunOpus 5.5repeat 1

Plan-execute on Add checked bags and collect the right fee

claude-opus-5-5__plan-execute__airline-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.110
Latency
32.8s
setup 0.0s, grading 0.0s
Turns
13
Tool calls
10
Subagents
0
Tokens in / out
53k / 2.4k
43,640 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.
  • The plan was a plan: heldplan-execute.planThe planner’s reply was read through its schema and held at least one step.
  • Each call was shown the right tools: heldplan-execute.toolsThe planner was shown no tools and the executor the task’s full toolset.

Phases

Plan: 0.0s to 11.5s, finished, 0 tool calls, $0.034
Execute: 11.5s to 32.8s, finished, 10 tool calls, $0.076

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

PhaseDurationCostTurnsToolsModel
Plan11.5s$0.03420claude-opus-5-5
Execute21.3s$0.0761110claude-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 plan-execute --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
10
failed tool calls
0
distinct tools
8

Final answer

I added both bags to Rosa Mendel's reservation R1042 and charged her $45.00, which is what she owes.

  • Booking: The reservation is confirmed, in economy, on flight AS420 from San Francisco to Seattle on 2026-08-11. The flight is still scheduled.
  • Bags: She had 1 checked bag and now has 3, which is the most one reservation can hold, so both bags fit.
  • Free bags: She gets 2 free checked bags: 1 with her economy ticket and 1 more for her silver frequent-flyer status. Her first new bag (her 2nd overall) is free. Her other new bag (her 3rd overall) is the first one she pays for, at the published $45.00. The $75.00 price only applies to paid bags after that, so it doesn't apply here.
  • Charge: I posted one baggage fee of $45.00 (entry L1) to R1042. It's the only entry on the reservation's ledger. I didn't change any other booking or record.

The date given to me says today is 2026-10-04, which would put this flight in the past. The airline system says today is 2026-07-28 and still lists the flight as scheduled. I treated the booking as an upcoming trip because the reservation is confirmed and the flight hasn't left.

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.