Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by claude-opus-5.5
claude-opus-5.5 · round 1 · seed 1$0.01SVGautopsy.txt
autopsy.txt · 23 lines
Yes. As far as I can tell, the diagram is correct.

Why:
- Stacking order: knob, lid, plunger rod, filter, retaining nut, glass beaker,
  frame. That is the real assembly order from top to bottom.
- Every part is centred on the red dash-dot axis, so the rod runs straight
  through the knob, the lid bore, all three filter discs and the nut.
- The 3-piece filter is a cross plate, a mesh screen and a spiral plate,
  held on by a nut at the bottom of the rod. The spiral plate's coil edge is
  drawn, and the filter discs are about as wide as the inside of the beaker,
  which they need to be to seal.
- The beaker spout and the lid's pour lip are both on the right. The frame
  handle is on the left, opposite the spout, which is how a real press is
  built. The beaker's volume marks are also on the right.
- The callouts 1-9 each point at the right part, and the notes are accurate:
  the knob threads onto the rod, the rod is threaded at both ends, and the
  beaker drops into the frame.

One caveat: makers order the filter discs differently. Some put the spiral
plate on top and the cross plate at the bottom. Either way the press works,
and this drawing matches its own labels ("clamps screen to spiral plate"),
so I don't count that as an error.
gallery/Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture/Opus 5.5, run 1

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

modelanthropic/claude-opus-5.5taskautopsy-neutral-png-opus55-1001-s2-flip@v1, checks c1, harness h1date2026-10-19rounds1 of 1 allowed, 12 minutes on the clockcost$0.0093thinkingmediumtokens18,207 in, 2,498 out, of which 1,442 reasoningtime46 sfailedFinds the flip: incomplete, annotation missing, major

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 filefail
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 Opus 5.5, run 2run 2 · 1r · $0.0068Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by Opus 5.5, run 3run 3 · 1r · $0.0257Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by Opus 5.5, run 4run 4 · 1r · $0.0099Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by Opus 5.5, run 5run 5 · 1r · $0.0222
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.