Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by claude-opus-5.5
claude-opus-5.5 · round 1 · seed 3$0.02SVGautopsy.txt
autopsy.txt · 24 lines
NO - the diagram is not correct.

Main error: the three filter pieces are stacked in the wrong order.
- The diagram shows, from top to bottom: spiral plate (4), mesh screen (5),
  cross plate (6), then the retaining nut (7).
- On a real plunger the cross plate sits on top. It is the spoked disc you
  see when you look down into the press. The mesh screen goes in the middle,
  and the spiral plate goes on the bottom. Its spring coil around the rim
  presses out against the glass, and the nut or threaded foot holds the
  whole stack on the end of the rod.
- So parts 4 and 6 need to swap places. The cross plate clamps the screen
  down onto the spiral plate from above.

Labeling error: the bracket marked "3-piece filter" covers four parts. It
runs from the spiral plate down to the retaining nut. The nut is a fastener,
not one of the three filter pieces, so the bracket should stop at the
lowest filter plate.

Parts that look right:
- Knob, lid, rod and filter stack all sit on one center axis.
- The lid's pour notch lines up with the beaker spout.
- The handle is on the opposite side from the spout.
- The beaker is drawn a little narrower than the frame, so it can drop in.
gallery/Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control)/Opus 5.5, run 3

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

modelanthropic/claude-opus-5.5taskautopsy-neutral-png-opus55-1001-s2@v1, checks c1, harness h1date2026-10-19rounds1 of 1 allowed, 12 minutes on the clockcost$0.0154thinkingmediumtokens28,275 in, 4,355 out, of which 2,817 reasoningtime1 min 6 sfailedInvents nothing: incomplete, annotation extra, major

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 filefail

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 Opus 5.5, run 1run 1 · 1r · $0.0072Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by Opus 5.5, run 2run 2 · 1r · $0.0076Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by Opus 5.5, run 4run 4 · 1r · $0.0097Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control), by Opus 5.5, run 5run 5 · 1r · $0.0077
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.