ScaffoldBench

RunHaiku 4.5repeat 1

Plan-execute-verify on Add checked bags and collect the right fee

claude-haiku-4-5-20251001__plan-execute-verify__airline-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.078
Latency
1m 18s
setup 0.0s, grading 0.0s
Turns
14
Tool calls
9
Subagents
0
Tokens in / out
39k / 9.2k
18,956 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 46.4s, finished, 0 tool calls, $0.032
Execute: 46.4s to 1m 2s, finished, 5 tool calls, $0.025
Verify: 1m 2s to 1m 18s, finished, 4 tool calls, $0.022

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

PhaseDurationCostTurnsToolsModel
Plan46.4s$0.03220claude-haiku-4-5-20251001
Execute16.1s$0.02565claude-haiku-4-5-20251001
Verify15.7s$0.02264claude-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-easy --models claude-haiku-4-5-20251001 --repeats 1

Score breakdown

  • passReservation holds three checked bags and is otherwise untouched
    1.00weight 0.43

    checked_bags=3, status=confirmed

  • passExactly one baggage fee, for the bags beyond the free allowance
    1.00weight 0.57

    expected 4500 cents for 1 chargeable bag(s), charged 4500

Penalties

No penalties were applied.

Scorer metadata

tool calls
9
failed tool calls
0
distinct tools
6

Final answer

Perfect! I've successfully completed the task:

Summary:

  • Reservation R1042 (Rosa Mendel, flying SFO→SEA on 2026-08-11)
  • Updated checked bags: 1 → 3 bags
  • Rosa's free baggage allowance: 2 bags (1 from economy cabin + 1 from silver tier status)
  • Chargeable bags: 1 (beyond the free allowance)
  • Amount collected: $45.00 (4500 cents) for the first chargeable bag

Rosa's reservation now includes 3 checked bags (the airline maximum), and she has been charged exactly what she owes for the 2 additional bags she requested.

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.