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.

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 tieGemini 3.8 Flash

- #1 tieOpus 5.5

- #3 tieDeepSeek V4.1 Flash

- #3 tieGPT-6 Luna

- #3 tieGPT-6 Sol

- #6Kimi K3 (Moonshot)
not acceptable
Parts marked not acceptable fall below the reviewer's acceptable line whatever their order. Ordering by hand decides Human rank and Human rate on the leaderboard; it never affects Overall or Strict.
Every model's attempts
This is an older run. See the current results.
Run hard-baseline-2026-09-232026-09-23commit 6edf19e0spend $212.67 + $43.09 AI judging, 15 unpricedstopped early (interrupted)Other runs: 2026-10-16T18-49-10-hard-compact-2026-10-16, 2026-09-10T19-44-23-baseline-2026-09, 2026-09-04T20-02-10-stage2-hard-cases, 2026-09-04T19-48-31-screen-14-fixed