Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by pareto-26.9
pareto-26.9 · round 1 · seed 4$0.02SVGautopsy.txt
autopsy.txt · 19 lines
No. The filter stack is reversed for a conventional three-piece French press.

The diagram puts the cross plate (4) above the mesh (5) and the spiral plate
(6) below it. The usual order, from the lid toward the bottom of the beaker,
is:

  plunger rod -> spiral/spring plate -> mesh screen -> cross plate

The spring-edged spiral plate belongs above the mesh, with its perimeter
spring holding the mesh edge against the glass. The cross plate belongs
underneath, supporting the mesh against the upward force during plunging.
Swap parts 4 and 6 and revise the cross-plate description accordingly.

The fastening arrangement varies by model: many presses screw the rod into
a threaded hub on the bottom cross plate rather than use a separate retaining
nut. A separate nut is not inherently wrong if the parts are designed for it.

The knob, lid, rod, beaker, and outer frame are otherwise arranged plausibly.
gallery/Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture/Pareto 26.9, run 4

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

modelunbiased/pareto-26.9taskautopsy-neutral-png-opus55-1001-s2-flip@v1, checks c1, harness h1date2026-10-19rounds1 of 1 allowed, 12 minutes on the clockcost$0.0190thinkingmediumtokens26,805 in, 2,869 out, of which 0 reasoningtime32 s

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

Finds the flipdecided by a number, from the filepass
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
Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by Pareto 26.9, run 4run 4 · 1r · $0.0245Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by Pareto 26.9, run 5run 5 · 1r · $0.0265
same prompt, other modelsall 8 runs on Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture →
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

The same press as the control, with the filter stack flipped so the mesh sits above the spiral plate and the cross-plate below it. That is one defect and it is the one that stops the press working. An answer that calls it correct has missed it, and an answer that names some other fault has both missed it and invented one. How it is scored, and this run's files on GitHub.