partforge

Photo lid then centred

hard tier · iterate

The requests, in order

1The attached photo shows the inside of a plastic case lid from above, though not squarely — the camera is off to one side and a cutting mat is in frame. The lid is 174.34 mm long and 17.98 mm tall overall, with 2.63 mm walls and floor, and a grid of 0.75 mm ribs standing 2.25 mm above the floor. Make one that matches the picture: the outline, the rib grid exactly as the photo shows it, and the cut-off inner corners each with a 4 mm round magnet pocket. Build it open side up — the floor's outer face on Z = 0, length along X, width along Y, centred on the origin. Name the sub-part `lid`.
2Here is a straight-on shot of the same lid from directly above. Use it to check the outline and proportions, and fix anything that is off.
The photograph the model was given
Photo · made with iPhone camera · CC0-1.0

What the AI judge checks

  • The overall form matches the reference: the same kind of object, the same silhouette from the matching angle
  • Proportions match: the relative sizes of the major dimensions agree with the reference within what the eye can judge
  • Every major feature visible in the reference (holes, slots, bosses, tabs, lips) is present in the result
  • Those features sit where the reference has them
  • Nothing is present that the reference does not show — no decorative or unexplained geometry
  • Each inner corner is cut off diagonally and carries one small round pocket
  • An open tray whose walls stand well above the rib grid, with no lid, cover or ribs reaching the rim

Measured checks

  • watertight (gate)
  • one sub-part named lid (gate)
  • length is 174.34 mm
  • width is 107 mm ± 10 %
  • height is 17.98 mm
  • the tray is hollow
  • the floor is solid
  • 7 ribs across the length on the 8-pocket pitch
  • 4 ribs across the width on the 5-pocket pitch
  • every pocket is open above its floor
  • the ribs stop below the rim
  • watertight (gate)
  • one sub-part named lid (gate)
  • the apply was scored against the photo
  • silhouette matches the photo
  • length is 174.34 mm
  • width is 107 mm ± 10 %
  • height is 17.98 mm
  • the tray is hollow
  • the floor is solid
  • 7 ribs across the length on the 8-pocket pitch
  • 4 ribs across the width on the 5-pocket pitch
  • every pocket is open above its floor
  • the ribs stop below the rim
  • the straight-on photo joined scoring

Ranked by hand

One reviewer put one attempt from each model in order, best first, ties left tied.

  1. #1 tie
    Gemini 3.8 Flash
    Gemini 3.8 Flash's ranked attempt
  2. #1 tie
    GPT-5.6 Sol
    GPT-5.6 Sol's ranked attempt
  3. #1 tie
    GPT-6 Astra
    GPT-6 Astra's ranked attempt
  4. #1 tie
    Opus 5
    Opus 5's ranked attempt
  5. #1 tie
    Fable 5.1
    Fable 5.1's ranked attempt

Ordering by hand decides Human rank and Human rate on the leaderboard; it never affects Overall or Strict.

Every model's attempts

Run baseline-2026-092026-09-10commit 41aec7daspend $339.70 + $48.02 AI judging, 7 unpricedOther runs: 2026-09-04T20-02-10-stage2-hard-cases, 2026-09-04T19-48-31-screen-14-fixed