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← mecheval. / run / a1-stepped-shaft-01 / claude-direct-claude-opus-4-7 / 20260428T153537Z-33d7

run 20260428T153537Z-33d7

a1-stepped-shaft-01 · claude-direct-claude-opus-4-7

Summary

status	PASS
score	1.00 (4/4)
submission	self-run
model	claude-direct-claude-opus-4-7 (anthropic)
started	2026-04-28T15:35:37.045Z
ended	2026-04-28T15:35:40.517Z
tokens	865 in · 291 out · 1,156 total
wallclock	3.4s
tool calls	1
task hash	`0b362741f05ae514…`
vcad hash	`95f625ad44e581da…`

Prompt

Make a stepped shaft along the Z axis: a base cylinder of diameter 40mm and height 10mm sitting on the XY plane (z = 0 to z = 10), with a smaller coaxial cylinder of diameter 20mm and height 15mm stacked directly on top (z = 10 to z = 25). The result is a single solid.

Checks

valid_solid

pass

params + details

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 1,
  "solids_produced": 1
}

bbox

pass

params + details

params: {
  "type": "bbox",
  "min": [
    -20,
    -20,
    0
  ],
  "max": [
    20,
    20,
    25
  ],
  "tolerance_mm": 0.1
}

details: {
  "actual_max": [
    20,
    20,
    25
  ],
  "actual_min": [
    -20,
    -20,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.1
}

mass_props

pass

params + details

params: {
  "type": "mass_props",
  "volume_mm3": 17278.76,
  "tolerance_pct": 1
}

details: {
  "volume": {
    "actual_mm3": 17167.948359636033,
    "deviation_pct": 0.6413170873602339,
    "pass": true,
    "spec_mm3": 17278.76,
    "tolerance_pct": 1
  }
}

step_roundtrip

pass

params + details

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          20,
          20,
          25
        ],
        "original_min": [
          -20,
          -20,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          20,
          20,
          25
        ],
        "roundtripped_min": [
          -20,
          -20,
          0
        ],
        "tolerance_mm": 0.6184658438426491
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 17167.94835963603,
        "pass": true,
        "roundtripped_mm3": 17167.94835963603
      }
    }
  ],
  "tolerance_pct": 1
}

Tool calls

anthropic.messages.create

3442ms

args

{
  "model": "claude-opus-4-7",
  "max_tokens": 8000,
  "system_chars": 1632,
  "user_chars": 331
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260428T153537Z-33d7.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": { "id": 1, "name": "base", "op": {"type":"Cylinder", "radius":20.0, "height":10.0, "segments":32} },
    "2": { "id": 2, "name": "top_small", "op": {"type":"Cylinder", "radius":10.0, "height":15.0, "segments":32} },
    "3": { "id": 3, "name": "top_translated", "op": {"type":"Translate", "child":2, "offset":{"x":0.0,"y":0.0,"z":10.0}} },
    "4": { "id": 4, "name": "shaft", "op": {"type":"Union", "left":1, "right":3} }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root":4, "material":"default"}]
}

drawing mecheval.	sheet RUN · 20260428T153537Z-33d7	scale PASS
date 2026-04-29	drawn by muni	project mecheval

generated 2026-04-29T00:03:43.122Z · static site, regenerate with npm run build -w @mecheval/leaderboard