Photo knob

Sonnet 5.5, effort high$0.111m 2s1m 0s waiting on the model1 build

Reference
iso
front
back
top
bottom
left
right

89of 100

built: 100
geometry: 85
AI judge: 6 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 side view shows a short knurled cylinder with chamfered top and bottom rims, matching the reference silhouette.
- GPT-6 Sol: pass: The renders show the same basic cylindrical, diamond-knurled knob with chamfered rims.
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 height-to-diameter ratio is roughly 0.35–0.4 in both the reference and the render, and the chamfer and plain bands are similarly sized.
- GPT-6 Sol: fail: In the side view, the produced knob is visibly taller relative to its diameter than 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 render has the diamond knurl band, chamfers at both rims, and plain bands above and below the knurl, as in the reference.
- GPT-6 Sol: pass: The reference’s diamond knurl and chamfers at both rims are present.
Pass:Those features sit where the reference has them
- Opus 5.5: pass: The knurl band occupies the middle of the side, with chamfers at the top and bottom edges as in the photo.
- GPT-6 Sol: pass: The knurl covers the side between the upper and lower rim chamfers, as in the reference.
Pass:Nothing is present that the reference does not show — no decorative or unexplained geometry
- Opus 5.5: pass: Apart from the requested D-bore in the top, no extra geometry appears; the bottom face is plain.
- GPT-6 Sol: pass: The renders show no unexplained geometry; the top bore is specified in the request.
Pass:A diamond knurl around the side — crossing grooves, not smooth and not straight ridges
- Opus 5.5: pass: Crossing diagonal grooves form a diamond pattern around the side.
- 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 a single central D-shaped bore.
- GPT-6 Sol: pass: The flat top face has one central 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

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This is an older run. See the current results.

Run kimi31-sonnet-hard2026-11-05commit 58201d93spend $50.99 + $14.79 AI judgingOther runs: 2026-11-05T05-50-12-kimi31-vs-sonnet, 2026-10-16T18-49-10-hard-compact-2026-10-16, 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