Knob then widen

Kimi K3.1 Pro$0.583m 56s3m 48s waiting on the model5 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 result 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, chamfered cylindrical form with a knurled side 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 reference side view is about 3.1:1 width to height, so a 20% wider part should be about 3.7:1; the result's side view is only about 2.8:1, so the diameter was not visibly enlarged relative to the height.
- GPT-6 Sol: fail: The rendered side silhouette is noticeably taller relative to its diameter than the reference, despite the requested diameter increase.
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, the top and bottom chamfers and a central bore are all present.
- GPT-6 Sol: pass: The visible chamfer and diamond-patterned side are present, and the render also 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 wraps the side between the chamfered edges, and the bore sits at the centre of the top face, consistent with the reference.
- GPT-6 Sol: pass: The knurl wraps the side below the top chamfer, and the bore sits at the centre of the top face.
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: No extra decorative or unexplained geometry appears beyond the knurl, the chamfers and the bore.
- GPT-6 Sol: pass: The renders show no additional bosses, slots, tabs, or decorative 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: Diagonal grooves cross around the side to form a clear diamond knurl.
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 D-shaped hole in the centre and nothing else cut into it.
- GPT-6 Sol: pass: The flat top face has one central hole and no other cuts.

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-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