ScaffoldBench

RunHaiku 4.5repeat 2

Plan-execute-verify on Cancel a fare the customer wrongly believes is refundable to their card

claude-haiku-4-5-20251001__plan-execute-verify__airline-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.100
Latency
1m 54s
setup 0.0s, grading 0.0s
Turns
14
Tool calls
9
Subagents
0
Tokens in / out
44k / 12k
17,019 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-verify.planThe planner’s reply was read through its schema and held at least one step.
  • Every verdict was read: heldplan-execute-verify.verdictsEvery review round ended with a verdict read from the schema reply, not a default.
  • The loop did what its verdicts said: heldplan-execute-verify.loopEvery verdict that called for a revision got one, and nothing was revised without such a verdict.
  • Each call was shown the right tools: heldplan-execute-verify.toolsThe planner was shown no tools, the verifier the read-only ones, and the executor and reviser the full toolset.

Phases

Plan: 0.0s to 57.7s, finished, 0 tool calls, $0.032
Execute: 57.7s to 1m 35s, finished, 5 tool calls, $0.042
Verify: 1m 35s to 1m 54s, finished, 4 tool calls, $0.026

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

PhaseDurationCostTurnsToolsModel
Plan57.7s$0.03220claude-haiku-4-5-20251001
Execute37.6s$0.04265claude-haiku-4-5-20251001
Verify19.2s$0.02664claude-haiku-4-5-20251001

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-verify --tasks airline-hard --models claude-haiku-4-5-20251001 --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
9
failed tool calls
0
distinct tools
6

Final answer

Task completed.

I've processed the cancellation of reservation R3311 for Marcus Bell. Here's what happened:

Settlement: $248.00 issued as travel credit (not back to his card)

Why not a cash refund:

  • Basic economy fares are non-refundable
  • His trip insurance does override this, BUT only pays cash back to the card if cancellation is made at least 14 days before departure
  • He's canceling on 2026-07-28 for a flight on 2026-08-05—just 8 days away
  • When canceling within 14 days, the insurance policy converts the fare into travel credit instead of returning cash to his card

Actions taken:

  1. ✓ Issued $248.00 as travel credit to his account
  2. ✓ Cancelled reservation R3311 and released his seat

Marcus will need to use the $248 travel credit for a future flight rather than receiving cash on his card, as required by the insurance terms for cancellations made close to departure.

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.