RunOpus 5.5repeat 1

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

claude-opus-5-5__single__airline-hard__r1

Score

1.000

passed

design ran as designed

Cost: $0.055
Latency: 18.3s; setup 0.0s, grading 0.0s
Turns: 8
Tool calls: 7
Subagents: 0
Tokens in / out: 30k / 1.3k; 26,282 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$0.055

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

Phase	Duration	Cost	Turns	Tools	Model
Main	18.3s	$0.055	8	7	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: 7
failed tool calls: 0
distinct tools: 7

Final answer

I cancelled R3311 and returned the full $248.00 as travel credit. It could not go back to Marcus's card: the airline's rules don't allow it for this booking, so I didn't do that part of his request.

Why not his card:

Fare: Basic economy fares are non-refundable on their own.
Insurance: His trip insurance can override that and refund the card, but only if he cancels at least 14 days before departure. The refund policy gives today's date as 2026-07-28, and his SFO→BOS flight AA660 leaves on 2026-08-05, which is 8 days away. Inside 14 days, the insurance turns the fare into travel credit and nothing goes back to the card.
Booking date: He booked on 2026-04-11, so the 24-hour full-refund rule doesn't apply.

Why he gets the full $248: The usual $50 cancellation service fee is waived because Marcus is a platinum member. Nothing had been paid back on this booking before, and none of the trip had been flown.

What I did:

Cancelled R3311, which released the seat.
Recorded a single $248.00 travel-credit refund on the ledger as entry L1. That closes the booking out financially.

Note on dates: My environment shows today as 2026-10-05, but the airline's refund policy shows 2026-07-28. I went by the policy's date, and the flight is still listed as scheduled. If 2026-10-05 were the real date, the flight would already have left and this cancellation wouldn't make sense. You may want to check which date is correct.

Message for Marcus: His insurance still protected the full $248, but because he cancelled less than 14 days before the flight, it comes back as travel credit rather than a card refund.

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.