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 4$0.04SVGautopsy.txt
autopsy.txt · 21 lines
Yes, as a schematic of a conventional French press.

The main parts and their assembly order are consistent:
- The knob attaches to the top of the plunger rod, which slides through
  the lid's central opening.
- Below the rod, the filter stack is ordered correctly: spring/spiral
  plate on top, fine mesh screen in the middle, and cross/support plate
  underneath. The spring-loaded rim holds the mesh against the beaker
  wall, helping keep grounds from passing around its edge.
- The lower fastening holds the filter assembly together on the rod.
- The glass beaker sits in the outer frame, which carries the handle.

This is an exploded view: the gaps between parts are for illustration,
not gaps that remain in the assembled press. The filter operates inside
the beaker, with the lid seated at the top.

Two minor qualifications: the fastening arrangement varies by model
(some cross plates thread directly onto the rod), and the "3-piece
filter" bracket should cover parts 4-6 only, not the separate nut at 7.
Neither changes the basic assembly shown.
gallery/Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control)/Pareto 26.9, run 4

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$0.0375thinkingmediumtokens39,428 in, 9,302 out, of which 0 reasoningtime1 min 23 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
Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by Pareto 26.9, run 2run 2 · 1r · $0.0288
same prompt, other modelsall 7 runs on Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control) →
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.