ScaffoldBench

RunOpus 5.5repeat 2

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

claude-opus-5-5__plan-execute__airline-easy__r2

Score

1.000

passed
design ran as designed
Cost
$0.098
Latency
31.7s
setup 0.0s, grading 0.0s
Turns
11
Tool calls
8
Subagents
0
Tokens in / out
44k / 2.4k
35,986 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 11.3s, finished, 0 tool calls, $0.030
Execute: 11.3s to 31.7s, finished, 8 tool calls, $0.068

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

PhaseDurationCostTurnsToolsModel
Plan11.3s$0.03020claude-opus-5-5
Execute20.4s$0.06898claude-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
8
failed tool calls
0
distinct tools
7

Final answer

I added both bags to Rosa's reservation R1042 and charged her $45.00 for them.

  • Bags: R1042 (Rosa Mendel, economy, SFO→SEA on flight AS420) now has 3 checked bags, up from 1. That is exactly the 3-bag limit per reservation, so both bags could be added. I read the reservation back and it shows 3 bags.
  • Free allowance: Rosa gets 2 free checked bags: 1 for the economy cabin plus 1 for her Silver frequent-flyer tier.

    • Bag #2 is free because it's within her allowance.
    • Bag #3 is her first bag over the allowance, which costs $45.00 under the baggage rules.
  • Charge: I recorded one baggage fee of $45.00 (4500 cents) on R1042. Nothing else on her booking or any other record was changed.

Two things to be aware of:

  • Flight date: The flight is dated 2026-08-11, which is before today (2026-10-06). The system still lists the flight as "scheduled" and the booking as confirmed, so I went ahead. Someone should confirm the flight date is right.
  • Payment method: Step 6 of the plan said to charge the fee to the payment method on file. The reservation record doesn't show one, and the fee tool doesn't take a payment method, so the fee was only recorded against the reservation.

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.