run 20260428T213327Z-164e

Summary

Prompt

Make a regular pentagonal prism. The cross-section is a regular pentagon centered on the Z axis with circumradius 15mm (distance from center to each vertex). Orient the pentagon so one vertex points in the +Y direction. Height 25mm along Z, base on the XY plane (z = 0 to z = 25). Drill one through-hole of diameter 5mm, axis parallel to Z, with its axis offset 5mm in the +X direction from the center (so hole axis is at (x=5, y=0)). Output a single solid.

Checks

params: {
  "type": "valid_solid"
}

details: {
  "error": "parse: Invalid JSON vcad file: missing field `angles` at line 5 column 140",
  "reason": "fatal evaluation error"
}

params: {
  "type": "bbox",
  "min": [
    -14.27,
    -12.13,
    0
  ],
  "max": [
    14.27,
    15,
    25
  ],
  "tolerance_mm": 0.3
}

details: {
  "reason": "no valid solid to measure"
}

params: {
  "type": "mass_props",
  "volume_mm3": 12884.48,
  "tolerance_pct": 1.5
}

details: {
  "reason": "no valid solid to measure"
}

params: {
  "type": "hole_count",
  "diameter_mm": 5,
  "expected": 1,
  "diameter_tolerance_mm": 0.05
}

details: {
  "actual": 0,
  "diameter_mm": 5,
  "diameter_tolerance_mm": 0.05,
  "expected": 1,
  "found": []
}

params: {
  "type": "hole_positions",
  "diameter_mm": 5,
  "positions": [
    [
      5,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.15
}

details: {
  "diameter_mm": 5,
  "per_expected": [
    {
      "pass": false,
      "reason": "no candidate cylindrical feature of this diameter remained unmatched",
      "spec_xy": [
        5,
        0
      ]
    }
  ],
  "tolerance_mm": 0.15,
  "unmatched_extras": []
}

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1.5
}

details: {
  "reason": "no valid solid to round-trip"
}

Tool calls

{
  "model": "claude-opus-4-7",
  "max_tokens": 8000,
  "system_chars": 1632,
  "user_chars": 522
}

What the model built

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": { "id": 1, "name": "pentagon_prism", "op": {"type":"Cylinder", "radius":15, "height":25, "segments":5} },
    "2": { "id": 2, "name": "pentagon_rotated", "op": {"type":"Rotate", "child":1, "axis":{"x":0,"y":0,"z":1}, "angle":1.5707963267948966} },
    "3": { "id": 3, "name": "hole", "op": {"type":"Cylinder", "radius":2.5, "height":27, "segments":32} },
    "4": { "id": 4, "name": "hole_positioned", "op": {"type":"Translate", "child":3, "offset":{"x":5,"y":0,"z":-1}} },
    "5": { "id": 5, "name": "result", "op": {"type":"Difference", "left":2, "right":4} }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{ "root": 5, "material": "default" }]
}

generated 2026-06-19T01:47:55.920Z · static site, regenerate with npm run build -w @mecheval/leaderboard