ScaffoldBench

RunOpus 5.5repeat 1

Plan-execute on Redirect the order that has not shipped

claude-opus-5-5__plan-execute__ecommerce-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.085
Latency
24.9s
setup 0.0s, grading 0.0s
Turns
10
Tool calls
7
Subagents
0
Tokens in / out
32k / 1.9k
24,055 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 9.0s, finished, 0 tool calls, $0.025
Execute: 9.0s to 24.9s, finished, 7 tool calls, $0.060

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

PhaseDurationCostTurnsToolsModel
Plan9.0s$0.02520claude-opus-5-5
Execute15.8s$0.06087claude-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 plan-execute --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
7
failed tool calls
0
distinct tools
4

Final answer

I put Dana Whitfield's new address on order O-1001, which hasn't shipped. Order O-1002, which is in transit, still has its original address.

  • O-1001 (not shipped): Both items (L1, a P-KEY; L2, two P-CAB) were still pending, so I changed the shipping address from "12 Alder Lane, Bristol BS1 4TR, UK" to "7 Quarry Rise, Sheffield S11 8XZ, UK". I checked the order afterwards: the new address saved exactly as entered, and the status, items and £167.00 paid are unchanged.
  • O-1002 (in transit): Its one item (a P-MON) shipped on 2026-07-07. I didn't touch it, and I checked afterwards that its address is still "88 Old Mill Road, Bristol BS3 2QQ, UK". Our policy doesn't allow changing the address on an order that has already shipped.

I made no other changes to her customer profile or any other order.

Differences from the plan:

  • The plan spelled the country as "United Kingdom", but I used "UK" because that's how you gave it and how her other addresses are written.
  • The address field is a single line of text, not separate fields.

Worth noting: The two orders had different old addresses (Alder Lane and Old Mill Road). The O-1002 parcel is going to Old Mill Road, not the new house. If she no longer has access to that address, she'll need to arrange collection or a redirect with the carrier, or return the item once it arrives. We can't change it on our side.

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.