Knob then widen

Opus 5.5, effort high$0.752m 29s2m 19s waiting on the model5 builds, 1 failed

Reference
iso
front
back
top
bottom
left
right

81of 100

built: 85
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 render is a short knurled cylindrical knob with chamfered edges and a diamond knurl band, matching the reference side silhouette.
- GPT-6 Sol: pass: The render shows the same basic low cylindrical knob, with a chamfered rim and 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 render's height-to-diameter ratio is about 0.38, versus about 0.33 in the reference; a 20% wider part should be squatter (about 0.27), not taller-looking.
- GPT-6 Sol: fail: The rendered side appears taller relative to its diameter than the reference, rather than 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, the top and bottom chamfers, and a top bore are all present.
- GPT-6 Sol: pass: The visible chamfer and diamond knurl are present, and the render also shows the requested top 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 band sits between the top and bottom chamfers as in the reference, and the bore is centered on the top face.
- GPT-6 Sol: pass: The chamfer borders the rim and the knurl covers the cylindrical 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: Beyond the knob body, knurl, chamfers and centered D-shaped bore, no extra decorative or unexplained geometry appears.
- GPT-6 Sol: pass: The renders show no clearly extraneous features beyond the knob, its knurl, chamfer, and requested bore.
Fail:The hole in the top is the same size as before — widened around it, not scaled with it
- Opus 5.5: fail: The renders show a centered D-bore, but neither the reference nor the renders offer a basis to confirm its size is unchanged rather than scaled.
- GPT-6 Sol: fail: The reference does not show the bore clearly enough to verify its size, and the rendered opening has a visible flat side.

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