← mecheval / run / a3-hex-nut-01 / claude-direct-claude-opus-4-7 / 20260428T213548Z-e2e0

run 20260428T213548Z-e2e0

a3-hex-nut-01 · claude-direct-claude-opus-4-7

Summary

statusfail
score0.67 (4/6)
submissionself-run
modelclaude-direct-claude-opus-4-7 (anthropic)
started2026-04-28T21:35:48.504Z
ended2026-04-28T21:35:52.805Z
tokens912 in · 350 out · 1,262 total
wallclock4.2s
tool calls1
task hash7a7b681fbc898d3a…
vcad hash3eab685b3252c0a9…

Prompt

Make a hexagonal nut. The outer cross-section is a regular hexagon with flat-to-flat distance 19mm (so 19mm wrench fits), oriented so two flats are parallel to the X axis (the top and bottom of the hex). Height 8mm along Z, base on the XY plane (z = 0 to z = 8). Concentric central through-hole of diameter 10mm, axis along Z. Output a single solid.

Checks

0
valid_solid
pass
params + details
params: {
  "type": "valid_solid"
}

details: {
  "root_count": 1,
  "solids_produced": 1
}
1
bbox
fail
Y off by +1.46mm
params + details
params: {
  "type": "bbox",
  "min": [
    -10.97,
    -9.5,
    0
  ],
  "max": [
    10.97,
    9.5,
    8
  ],
  "tolerance_mm": 0.2
}

details: {
  "actual_max": [
    10.963827133178711,
    10.963827133178711,
    8
  ],
  "actual_min": [
    -10.963827133178711,
    -10.963827133178711,
    0
  ],
  "deviation_max": [
    -0.006172866821289702,
    1.463827133178711,
    0
  ],
  "deviation_min": [
    0.006172866821289702,
    -1.463827133178711,
    0
  ],
  "max_abs_deviation_mm": 1.463827133178711,
  "tolerance_mm": 0.2
}
2
mass_props
fail
volume off by 27.7%
params + details
params: {
  "type": "mass_props",
  "volume_mm3": 1872.62,
  "tolerance_pct": 1.5
}

details: {
  "volume": {
    "actual_mm3": 2392.165729000582,
    "deviation_pct": 27.74432233985443,
    "pass": false,
    "spec_mm3": 1872.62,
    "tolerance_pct": 1.5
  }
}
3
hole_count
pass
params + details
params: {
  "type": "hole_count",
  "diameter_mm": 10,
  "expected": 1,
  "diameter_tolerance_mm": 0.1
}

details: {
  "actual": 1,
  "diameter_mm": 10,
  "diameter_tolerance_mm": 0.1,
  "expected": 1,
  "found": [
    [
      0,
      0,
      10
    ]
  ]
}
4
hole_positions
pass
params + details
params: {
  "type": "hole_positions",
  "diameter_mm": 10,
  "positions": [
    [
      0,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.15
}

details: {
  "diameter_mm": 10,
  "per_expected": [
    {
      "distance_mm": 0,
      "matched_hole": [
        0,
        0
      ],
      "pass": true,
      "spec_xy": [
        0,
        0
      ]
    }
  ],
  "tolerance_mm": 0.15,
  "unmatched_extras": []
}
5
step_roundtrip
pass
params + details
params: {
  "type": "step_roundtrip",
  "tolerance_pct": 1.5
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0.017614364624023438,
        "original_max": [
          10.963827133178711,
          10.963827133178711,
          8
        ],
        "original_min": [
          -10.963827133178711,
          -10.963827133178711,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          10.946212768554688,
          10.946212768554688,
          8
        ],
        "roundtripped_min": [
          -10.946212768554688,
          -10.946212768554688,
          0
        ],
        "tolerance_mm": 0.48038516810077125
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0.5236179514134183,
        "original_mm3": 2392.165729000583,
        "pass": true,
        "roundtripped_mm3": 2379.639919815976
      }
    }
  ],
  "tolerance_pct": 1.5
}

Tool calls

0
anthropic.messages.create
ok
4195ms
args
{
  "model": "claude-opus-4-7",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 405
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260428T213548Z-e2e0.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": { "id": 1, "name": "hex_cyl", "op": {"type":"Cylinder", "radius":10.9697, "height":8, "segments":6} },
    "2": { "id": 2, "name": "hex_rot", "op": {"type":"Rotate", "child":1, "angles":{"x":0,"y":0,"z":30}} },
    "3": { "id": 3, "name": "hole", "op": {"type":"Cylinder", "radius":5, "height":10, "segments":64} },
    "4": { "id": 4, "name": "hole_pos", "op": {"type":"Translate", "child":3, "offset":{"x":0,"y":0,"z":-1}} },
    "5": { "id": 5, "name": "nut", "op": {"type":"Difference", "left":2, "right":4} }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{ "root": 5, "material": "default" }]
}

generated 2026-06-19T01:47:55.870Z · static site, regenerate with npm run build -w @mecheval/leaderboard