Photo knob

GPT-6 Sol, effort high$0.302m 39s2m 34s waiting on the model4 builds

Reference
iso
front
back
top
bottom
left
right

87of 100

built: 100
geometry: 85
AI judge: 5 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 5.5: pass: The render is a short, wide cylindrical knob with a knurled side and a chamfered top rim, matching the reference silhouette from the side.
- GPT-6 Sol: pass: The render shows the same basic low, round knurled-knob silhouette as the reference.
Fail:Proportions match: the relative sizes of the major dimensions agree with the reference within what the eye can judgeAI judges disagreed
- Opus 5.5: pass: The diameter-to-height ratio looks roughly 3:1 in the side renders, similar to the reference.
- GPT-6 Sol: fail: The rendered knob appears taller relative to its width and has a much larger smooth area above the knurl.
Pass:Every major feature visible in the reference (holes, slots, bosses, tabs, lips) is present in the result
- Opus 5.5: pass: The render has a knurled band, a chamfer at the top rim, an apparent slight chamfer at the bottom edge, and the bore in the top face.
- GPT-6 Sol: pass: The side knurl and chamfers at both rims are visible in the render.
Fail:Those features sit where the reference has them
- Opus 5.5: fail: The reference has the knurl band centred between thin smooth bands at top and bottom, but the render has a much wider smooth band at the top and knurl running almost to the base with no matching bottom band.
- GPT-6 Sol: fail: The knurl begins substantially farther below the top rim than it does in the reference.
Pass:Nothing is present that the reference does not show — no decorative or unexplained geometry
- Opus 5.5: pass: No decorative or unexplained geometry appears beyond the knob body, the knurl, the chamfers and the bore.
- GPT-6 Sol: pass: The renders show no separate decorative or unexplained features.
Pass:A diamond knurl around the side — crossing grooves, not smooth and not straight ridges
- Opus 5.5: pass: The side shows crossing diagonal grooves that form a diamond pattern.
- GPT-6 Sol: pass: Crossing diagonal grooves form a diamond pattern around the side.
Pass:A flat top face with a single hole in its centre and nothing else cut into it
- Opus 5.5: pass: The top view shows a flat face with a single centred D-shaped bore whose flat faces up (+Y), and nothing else is cut into it.
- GPT-6 Sol: pass: The flat top shows one centred D-shaped hole and no other cuts.

One reviewer

Verdict: acceptable (from the ranking's acceptable line, not typed on this attempt)

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

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Run hard-compact-2026-10-162026-10-16commit 6fa9f854spend $116.04 + $54.69 AI judging, 1 unpricedOther runs: 2026-11-05T06-56-21-kimi31-sonnet-hard, 2026-11-05T05-50-12-kimi31-vs-sonnet, 2026-09-23T06-56-16-hard-baseline-2026-09-23, 2026-09-10T19-44-23-baseline-2026-09, 2026-09-04T20-02-10-stage2-hard-cases, 2026-09-04T19-48-31-screen-14-fixed