Photo knob oblique

Gemini 4 Argon$0.507m 40s7m 32s waiting on the model4 builds, 1 failed

Reference
iso
front
back
top
bottom
left
right

92of 100

built: 85
geometry: 93
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 5.5: pass: The result is a short knurled cylindrical knob with a central D-shaped bore in the top, matching the reference's silhouette from the three-quarter view.
- GPT-6 Sol: pass: The render shows the same low, round knob silhouette with a flat top and textured cylindrical side.
Pass:Proportions match: the relative sizes of the major dimensions agree with the reference within what the eye can judge
- Opus 5.5: pass: The height-to-diameter ratio (about 1:2.5 in the side view) and the bore size relative to the diameter look consistent with the reference.
- GPT-6 Sol: pass: The diameter, height, and central hole appear similar in relative size to the reference.
Pass:Every major feature visible in the reference (holes, slots, bosses, tabs, lips) is present in the result
- Opus 5.5: pass: The knurl, the chamfers at the top and bottom rims, and the D-flat bore are all visible in the renders.
- GPT-6 Sol: pass: The central D-shaped bore, diamond-textured side, and chamfered outer rims are visible.
Pass:Those features sit where the reference has them
- Opus 5.5: pass: The bore is centred in the top face, and the knurl spans the side between the chamfered rims, as in the reference.
- GPT-6 Sol: pass: The bore is centred on the top face, and the knurl occupies the side below the upper rim as in the reference.
Pass:Nothing is present that the reference does not show — no decorative or unexplained geometry
- Opus 5.5: pass: No extra geometry appears beyond the knurl, the chamfers and the bore.
- GPT-6 Sol: pass: The renders show no bosses, slots, or other unexplained geometry.
Pass:A diamond knurl around the side — crossing grooves, not smooth and not straight ridges
- Opus 5.5: pass: The side views show 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 only the single D-shaped bore at its centre.
- GPT-6 Sol: pass: The flat top face has one central bore 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 %: predicate returned false
✓ 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: ok
✓ chamfered at the bottom rim: ok
✓ 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-compact-2026-10-162026-10-16commit 6fa9f854spend $116.04 + $54.69 AI judging, 1 unpricedOther runs: 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