ScaffoldBench

RunOpus 5.5repeat 1

Single on Redirect the order that has not shipped

claude-opus-5-5__single__ecommerce-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.062
Latency
10.2s
setup 0.0s, grading 0.0s
Turns
7
Tool calls
6
Subagents
0
Tokens in / out
19k / 802
12,718 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

Main: 0.0s to 10.2s, finished, 6 tool calls, $0.062

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

PhaseDurationCostTurnsToolsModel
Main10.2s$0.06276claude-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

Record this cell yourself: npm run bench -- run --strategies single --tasks ecommerce-easy --models claude-opus-5-5 --repeats 1

Score breakdown

  • passThe order that has not shipped carries the new address
    1.00weight 0.43

    O-1001 address: 7 Quarry Rise, Sheffield S11 8XZ, UK

  • passThe edit did not spill onto the order already in transit
    1.00weight 0.29
  • passLooked up which order was still open before editing one
    1.00weight 0.14
  • passChecked the state of the order already in transit
    1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls
6
failed tool calls
0
distinct tools
4

Final answer

I've changed the address on Dana's unshipped order. The order that's already in transit still has its original address.

  • O-1001 (not shipped yet): The shipping address changed from "12 Alder Lane, Bristol BS1 4TR, UK" to "7 Quarry Rise, Sheffield S11 8XZ, UK". Both items on it (1 × P-KEY and 2 × P-CAB) haven't shipped, so they'll go to the new address.
  • O-1002 (in transit): It shipped on 2026-07-07 to "88 Old Mill Road, Bristol BS3 2QQ, UK". I checked it again after the change and nothing on it was altered. Store policy doesn't allow changing the address on a shipped order, so this one will still go to the Bristol address. If that address isn't hers any more, that will need sorting out with the courier or as a return.

The store system gives today's date as 2026-07-25, but my environment says 2026-10-05. This didn't affect the address change.

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.