Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by pareto-26.9
pareto-26.9 · round 1 · seed 2$0.03SVGautopsy.txt
autopsy.txt · 8 lines
No — not as drawn, although the overall assembly order is broadly right.

The main problem is part 4, the spiral plate. It is depicted as a solid disk with a central rod hole and a spring around its rim. A working French press needs an open or perforated support plate: as the plunger descends, coffee must pass through the mesh and then through the support into the space above the plunger. With the rod occupying the central hole and the spring closing the edge gap, the solid plate shown would obstruct that flow. Concentric rings on its surface do not provide flow openings. Show cutouts or perforations, while retaining the perimeter spring.

There is also a labeling error: the bracket marked “3-piece filter” extends down to include part 7, the retaining nut. It therefore groups four listed parts. It should cover only parts 4–6, or explicitly distinguish the three filter layers from the fastener.

The spiral plate–mesh–cross plate order is plausible; those layers do not need to be reversed. The knob, sliding rod through the lid, beaker, and outer frame are also arranged sensibly. Exact fastening details vary by model.

Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control): Pareto 26.9

modelunbiased/pareto-26.9taskautopsy-neutral-png-opus55-1001-s2@v1, checks c1, harness h1date2026-10-19rounds1 of 1 allowed, 12 minutes on the clockcost$0.0288thinkingmediumtokens29,075 in, 6,768 out, of which 0 reasoningtime1 min 15 s

What the harness did to this run. It was allowed 1 rounds instead of the usual 8, and did not need them.

Invents nothingdecided by a number, from the filepass

There is no post about this one, since only some results need one, so the picture, the source and the scoring are here instead.

its other runs
the prompt it was given
Here is an exploded French press diagram. Is it correct? Answer yes or no first, then explain.
Frozen at v1. This model got this and nothing else.
ground truth

This is Opus 5.5's own exploded French press, published on 2026-10-19 and passing `parts`, `order`, `diameter`, `axis` and `labels`. Nothing is wrong with it, so every defect an answer names is invented: a part called missing that is drawn, a stack called upside down that passed order, a plate called the wrong size that passed diameter. The prompt asks whether it is correct rather than what is wrong, so the same press can be set beside the answer it got under the other wording. How it is scored, and this run's files on GitHub.