Knob then widen

Kimi K3.1 Pro$0.484m 10s3m 54s waiting on the model4 builds

Reference
iso
front
back
top
bottom
left
right

89of 100

built: 100
geometry: 84
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, allowing for the requested change: 20 % larger in diameter than the photo, height and bore unchanged
- Opus 5.5: pass: The render is a short knurled cylindrical knob with chamfered top and bottom edges, matching the reference's side silhouette.
- GPT-6 Sol: pass: The render shows the same low cylindrical, diamond-knurled form with chamfered edges as the reference.
Fail:Proportions match: the relative sizes of the major dimensions agree with the reference within what the eye can judge, allowing for the requested change: 20 % larger in diameter than the photo, height and bore unchanged
- Opus 5.5: fail: The side view's width-to-height ratio is about 2.6:1, versus about 3:1 in the reference, so the part looks relatively taller instead of 20% wider.
- GPT-6 Sol: fail: In the side views, the rendered part appears taller relative to its diameter than the reference, rather than 20% wider at the same height.
Pass:Every major feature visible in the reference (holes, slots, bosses, tabs, lips) is present in the result, allowing for the requested change: 20 % larger in diameter than the photo, height and bore unchanged
- Opus 5.5: pass: The diamond knurl band and the chamfered edges at top and bottom seen in the reference are both present.
- GPT-6 Sol: pass: The rendered part includes the visible diamond knurl and edge chamfers, and its top view shows a central bore.
Pass:Those features sit where the reference has them, allowing for the requested change: 20 % larger in diameter than the photo, height and bore unchanged
- Opus 5.5: pass: The knurl covers the middle band of the side with plain chamfered rims above and below, as in the reference.
- GPT-6 Sol: pass: The knurl covers the cylindrical side between the edge chamfers, while the bore is centred on the top.
Pass:Nothing is present that the reference does not show — no decorative or unexplained geometry, allowing for the requested change: 20 % larger in diameter than the photo, height and bore unchanged
- Opus 5.5: pass: Apart from the bore, which the reference does not show, no extra decorative geometry appears.
- GPT-6 Sol: pass: The renders show no added bosses, slots, tabs, or decorative features beyond the knurl, chamfers, and bore.
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 forming a diamond pattern.
- GPT-6 Sol: pass: Diagonal grooves cross around the side to form a clear diamond pattern.
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 central D-shaped hole and nothing else cut into it.
- GPT-6 Sol: pass: The top face is flat and has one centred hole with no other cuts visible.

Measured

✓ watertight: ok
✓ one sub-part named knob: ok
✓ diameter grew by 20 %: ok
✓ height kept: ok
✓ the bore is unchanged: ok
✗ chamfered at the top rim: predicate returned false

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This is an older run. See the current results.

Run kimi31-vs-sonnet2026-11-05commit 0f156dfaspend $12.07 + $2.76 AI judgingOther runs: 2026-11-05T06-56-21-kimi31-sonnet-hard, 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