RunOpus 5.5repeat 2

Single on Cancel a fare the customer wrongly believes is refundable to their card

claude-opus-5-5__single__airline-hard__r2

Score

1.000

passed

design ran as designed

Cost: $0.049
Latency: 16.5s; setup 0.0s, grading 0.0s
Turns: 7
Tool calls: 6
Subagents: 0
Tokens in / out: 29k / 1.2k; 25,644 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

Spend$0.049

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

Phase	Duration	Cost	Turns	Tools	Model
Main	16.5s	$0.049	7	6	claude-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

A gate that blocked the right moveGated-execute · Haiku 4.5
Three proposals beat one agentPropose-select · Haiku 4.5
A verifier that earned its keepPlan-execute-verify · Sonnet 5.5
A revision that did not helpPlan-execute-verify · Haiku 4.5
The control, missing a stepSingle · Haiku 4.5

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

Score breakdown

passReservation is cancelled
1.00weight 0.29
passSettled with exactly one ledger entry, in the right form and for the right amount
1.00weight 0.57
expected a single travel_credit entry of 24800 cents; ledger holds 1 entries
passThe cancelled seat went back into inventory
1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls: 6
failed tool calls: 0
distinct tools: 6

Final answer

I cancelled R3311 and returned the full $248.00, but as travel credit, not back to Marcus's card as he asked. The airline's rules don't allow a card refund for this booking.

Why it's credit and not a card refund:

The fare is basic economy, which can't be refunded on its own.
Trip insurance only sends money back to the card if you cancel at least 14 days before the flight. The reservation system shows today as 2026-07-28, and the flight (AA660, SFO→BOS) leaves 2026-08-05, which is 8 days away. Inside that window, the insurance turns the fare into travel credit instead, and no money goes back to the card.
Marcus is a Platinum member, so the $50 cancellation fee is waived. That's why he gets the full $248.00.

What I did:

Checked the reservation and his profile, read the refund policy, and confirmed nothing had been refunded yet.
Cancelled R3311, which released the seat.
Issued $248.00 as travel credit (ledger entry L1). That closes the booking out financially.

One thing to check: the date I was given at the start was 2026-10-06, which would put the flight in the past. The reservation system says 2026-07-28 and still lists the flight as scheduled, so I went by the system's date. Either way he's inside the 14-day window, so the outcome is the same.

What to tell Marcus: the booking is cancelled and the full $248 is waiting as travel credit he can use on a future trip.

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.