Knob then widen

GPT-6 Sol, effort high$0.433m 16s3m 6s waiting on the model5 builds

Reference
iso
front
back
top
bottom
left
right

85of 100

built: 100
geometry: 84
AI judge: 4 of 6

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 edges and a diamond knurl band, matching the reference's side silhouette.
- GPT-6 Sol: pass: The result is the same kind of low, circular knob, with chamfered edges and a diamond-knurled side.
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, but the result's side view is only about 2.7–2.8:1 and looks relatively taller.
- GPT-6 Sol: fail: The rendered knob appears substantially 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 the central bore are all present.
- GPT-6 Sol: pass: The render shows the reference’s main visible features: a circular body, edge chamfers, and diamond side knurling.
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 cylindrical side between the chamfered edges, and the bore sits centered on the top face.
- GPT-6 Sol: pass: The chamfers remain at the edges and the diamond knurl remains on the outer side, as in the reference.
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 or decorative geometry beyond the knurl, chamfers and bore is visible.
- GPT-6 Sol: pass: The renders show no clearly extraneous exterior feature beyond the requested top bore.
Fail:The hole in the top is the same size as before — widened around it, not scaled with itAI judges disagreed
- Opus 5.5: pass: The D-shaped bore is small relative to the widened face, consistent with the body being widened around an unchanged hole.
- GPT-6 Sol: fail: The reference does not show the bore, so the renders cannot establish that its size was kept unchanged.

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 grew by 20 %: ok
✓ height kept: ok
✓ the bore is unchanged: ok
✗ chamfered at the top rim: predicate returned false

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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