ScaffoldBench

RunHaiku 4.5repeat 2

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

claude-haiku-4-5-20251001__plan-execute__airline-medium__r2

Score

0.000

policy violation
design ran as designed
Cost
$0.040
Latency
41.0s
setup 0.0s, grading 0.0s
Turns
9
Tool calls
6
Subagents
0
Tokens in / out
27k / 4.0k
15,643 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 20.7s, finished, 0 tool calls, $0.013
Execute: 20.7s to 41.0s, finished, 6 tool calls, $0.027

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

PhaseDurationCostTurnsToolsModel
Plan20.7s$0.01320claude-haiku-4-5-20251001
Execute20.2s$0.02776claude-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 --tasks airline-medium --models claude-haiku-4-5-20251001 --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

  • failExactly one fee, the fare difference for the flight actually booked
    0.00weight 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

  • policy violationCharged a change fee to a tier the fare rules exempt×0 · hard fail

    Dana Whitfield is a gold member; gold and platinum are exempt from change fees.

Scorer metadata

tool calls
6
failed tool calls
0
distinct tools
5

Final answer

Perfect! I've successfully completed the task. Here's what I did:

Summary:

  1. Confirmed Dana Whitfield's current booking: She was on AA210 departing at 17:40 in economy, with a fare of $310.
  2. Found the earliest available flight: On 2026-08-03, the earliest flight from SFO to ORD with an available seat in economy is AA204, departing at 09:05 (the 06:15 and 07:30 flights either had no economy seats or were cancelled).
  3. Applied the economy cabin fare rules:

    • Change fee: $75.00
    • Fare difference: $80.00 (new flight fare of $390 minus original fare of $310)
  4. Moved Dana to the new flight and recorded the charges:

    • Changed her reservation from AA210 to AA204
    • Charged $75.00 change fee
    • Charged $80.00 fare difference

Dana now owes $155.00 total for this change, which has been recorded in the reservation ledger. She is now confirmed on AA204 departing at 09:05 on 2026-08-03.

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.