ScaffoldBench

RunOpus 5.5repeat 2

Gated-execute on Rebook onto the earliest available flight and settle the difference

claude-opus-5-5__gated-execute__airline-medium__r2

Score

1.000

passed
design ran as designed
Cost
$0.143
Latency
42.2s
setup 0.0s, grading 0.0s
Turns
22
Tool calls
17
Subagents
2
Tokens in / out
69k / 3.0k
56,873 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.
  • Every state change was reviewed: heldgated-execute.reviewedEvery call that changed the world had been allowed by a review before it ran, counted from the world’s own journal.
  • Every decision was read: heldgated-execute.decisionsEvery review that ran to its end gave its decision through the schema; an unreadable one is a denial.
  • Each call was shown the right tools: heldgated-execute.toolsThe executor was shown the task’s full toolset and each reviewer the read-only tools.

Phases

Execute: 0.0s to 42.2s, finished, 8 tool calls, $0.063
Review 1: change_flight: 12.0s to 23.0s, finished, 4 tool calls, $0.040
Review 2: charge_fee: 25.4s to 35.5s, finished, 5 tool calls, $0.040

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

PhaseDurationCostTurnsToolsModel
Execute42.2s$0.06398claude-opus-5-5
Review 1: change_flight11.0s$0.04064claude-opus-5-5
Review 2: charge_fee10.1s$0.04075claude-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 gated-execute --tasks airline-medium --models claude-opus-5-5 --repeats 1

Score breakdown

  • passReservation moved to the earliest flight with an available seat, same cabin
    1.00weight 0.43

    booked on AA204, expected AA204

  • passExactly one fee, the fare difference for the flight actually booked
    1.00weight 0.43

    fare difference owed on the booked flight: 8000 cents

  • passExactly one economy seat moved from the old flight to the new one
    1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls
17
failed tool calls
0
distinct tools
9

Final answer

I moved Dana Whitfield (reservation R2087) onto flight AA204, which leaves SFO at 09:05 on 2026-08-03 and arrives at ORD. She owed $80.00, which I charged to the reservation.

How I chose the flight. She's booked in economy, so I looked for the earliest flight that day with an economy seat left:

  • UA88 (06:15): no economy seats left.
  • AA918 (07:30): cancelled.
  • AA204 (09:05): 4 economy seats left. This is the earliest that works, so I moved her onto it.

She stays in economy, and the change went through without any problems.

What she owes. I followed the economy fare rules:

  • Change fee ($75): waived, because she's a gold member.
  • Fare difference: she paid $310.00 and the AA204 economy fare is $390.00. Gold members still pay fare differences, so I charged $80.00 as one fare-difference entry. This is the only charge on the reservation.

Nothing else was changed. She keeps her 1 checked bag, and no other booking was touched.

Date mismatch: my environment gives today's date as 2026-10-06, which would put this 2026-08-03 flight in the past. The airline system still shows both flights as "scheduled" and with seats for sale, so I went ahead. If 2026-10-06 really is today, someone should check this booking.

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.