Photo knob oblique

GPT-6 Luna, effort high$0.022m 55s2m 50s waiting on the model3 builds, 1 failed

Reference
iso
front
back
top
bottom
left
right

88of 100

built: 85
geometry: 86
AI judge: 7 of 7

What the AI judge checked

Pass:The overall form matches the reference: the same kind of object, the same silhouette from the matching angle
- Opus 4.8: pass: The render shows a short cylindrical knurled knob with a central bore matching the reference silhouette.
- GPT-5.6 Sol: pass: The renders show the same low cylindrical knurled knob silhouette with flat top and chamfered rims as the reference.
Pass:Proportions match: the relative sizes of the major dimensions agree with the reference within what the eye can judge
- Opus 4.8: pass: The diameter-to-height ratio and central hole size roughly match the reference disk shape.
- GPT-5.6 Sol: pass: The rendered diameter-to-height ratio, rim widths, and central bore scale visually agree with the reference.
Pass:Every major feature visible in the reference (holes, slots, bosses, tabs, lips) is present in the result
- Opus 4.8: pass: Chamfered rims, knurl, and central bore with a flat are all present.
- GPT-5.6 Sol: pass: The central D-shaped bore, flat top, upper and lower rim chamfers, and knurled side are all present.
Pass:Those features sit where the reference has them
- Opus 4.8: pass: The bore is centered in the top face and the knurl wraps the side as in the reference.
- GPT-5.6 Sol: pass: The bore is centered on the top face while the knurl and chamfers occupy the same sidewall and rim locations as in the reference.
Pass:Nothing is present that the reference does not show — no decorative or unexplained geometry
- Opus 4.8: pass: No extra decorative geometry beyond the knurl, chamfers, and bore is visible.
- GPT-5.6 Sol: pass: The renders show no separate bosses, slots, tabs, or other unexplained features beyond the intended knurl geometry.
Pass:A diamond knurl around the side — crossing grooves, not smooth and not straight ridges
- Opus 4.8: pass: The side shows a crossing diamond pattern rather than smooth or straight ridges.
- GPT-5.6 Sol: pass: The sidewall clearly has intersecting diagonal grooves forming a continuous diamond knurl pattern.
Pass:A flat top face with a single hole in its centre and nothing else cut into it
- Opus 4.8: pass: The flat top face has a single central bore with a flat and nothing else cut into it.
- GPT-5.6 Sol: pass: The top is a plain flat circular face with one centered D-profile hole and no other visible cuts.

Measured

✓ watertight: ok
✓ one sub-part named knob: ok
✓ diameter is 38.13 mm: ok
✓ height is 12 mm ± 10 %: ok
✓ the bore clears 9.5 mm to 10.64 mm deep: ok
✓ the bore is not oversize: ok
✓ the D flat is where the prompt put it: ok
✓ the flat is not cut too deep: ok
✓ the bore is blind: ok
✗ chamfered at the top rim: predicate returned false
✗ chamfered at the bottom rim: predicate returned false
✓ the side is full at mid-height: ok
✓ the top face is flat out to 34.7 mm: ok
✓ silhouette matches the photo: ok

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Run hard-baseline-2026-09-232026-09-23commit 6edf19e0spend $212.67 + $43.09 AI judging, 15 unpricedstopped early (interrupted)Other runs: 2026-09-10T19-44-23-baseline-2026-09, 2026-09-04T20-02-10-stage2-hard-cases, 2026-09-04T19-48-31-screen-14-fixed