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 2$0.01SVGautopsy.txt
autopsy.txt · 21 lines
Yes, the diagram is essentially correct.

Explanation:
- Stack order along the central axis, top to bottom, matches how a standard
  (Bodum-style) French press goes together: knob, lid, plunger rod, filter
  assembly, glass beaker, frame/handle.
- The knob threads onto the top of the rod, and the rod passes through the
  centre bore of the lid. The rod is drawn threaded at both ends, which is right.
- Filter assembly order is right: the spiral plate is on top (its spring coil
  rim seals against the glass), then the mesh screen, then the cross plate,
  which clamps the mesh up against the spiral plate. The retaining nut at the
  bottom threads onto the rod end and holds the stack together.
- The beaker's spout and the lid's pour notch both face right, and the frame
  handle is on the left, opposite the spout. That is the correct orientation.
- The beaker drops into the frame, which has a base and feet.

Minor nitpick (labelling, not assembly): the "3-piece filter" bracket also
covers part 7, the retaining nut. The filter itself is three pieces (4-6), and
the nut is a separate fastener. That is a small labelling inaccuracy, not a
mistake in the parts or their order.
gallery/Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture (control)/Opus 5.5, run 2

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$0.0076thinkingmediumtokens14,091 in, 2,120 out, of which 1,059 reasoningtime34 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 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 3run 3 · 1r · $0.0154Autopsy, 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.