ScaffoldBench

RunHaiku 4.5repeat 1

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__r1

Score

0.429

wrong answer
design ran as designed
Cost
$0.161
Latency
3m 5s
setup 0.0s, grading 0.0s
Turns
26
Tool calls
18
Subagents
0
Tokens in / out
85k / 19k
45,203 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.

The run, call by call

80 recorded events, folded into 42

5 calls · 3m 5s · $0.161

  • tool call
  • denied by the guard
  • tool returned an error
  • shown no tools (reasoning only)
  • lost its tools (server failed)
  • failed

Score breakdown

  • passReservation is cancelled
    1.00weight 0.29
  • failSettled with exactly one ledger entry, in the right form and for the right amount
    0.00weight 0.57

    expected a single travel_credit entry of 24800 cents; ledger holds 2 entries

  • passThe cancelled seat went back into inventory
    1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls
18
failed tool calls
1
distinct tools
6

Final answer

Final Answer

I've corrected the settlement for reservation R3311. The issue has been fixed:

What Marcus Bell now receives: $248.00 travel credit (the full amount he paid)

Why the correction: Marcus Bell is a Platinum tier frequent flyer. The refund policy explicitly waives the $50 cancellation service fee for Platinum members. The previous attempt incorrectly charged this fee, reducing his travel credit to $198.00.

Action taken: I issued an additional $50.00 travel credit to bring the total settlement to the correct amount of $248.00.

The ledger now correctly reflects:

  • Initial travel credit: $198.00
  • Additional travel credit (correction): $50.00
  • Total travel credit: $248.00

Marcus can use this full $248.00 credit toward any future flight with the airline.

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.