Gallery, prompt v1

Exploded hand grinder

One frozen prompt and every model that has run it, newest first.

The prompt, v1, frozen

Draw an exploded assembly diagram of a manual coffee grinder, as an SVG. Use a hand grinder with conical burrs rather than flat burrs.

Every model, its first three runs.

One square a check, in this order:

All eight parts
Stack order
Parts fit
One assembly axis
Labels match

passed, failed, undecided. A round mark is a check I judged by eye, and a diamond one a check a model judged.

Claude Haiku 5.5
GPT-6.1 Sol
Pareto 26.10 Preview
GPT-6 Luna

What a run cost, against checks passed.

One dot a model, over its three runs above. Further right costs more. The gap from $0.01 to $0.1 is as wide as the gap from $0.1 to $1, so the cheap models are not squeezed into a corner.

Every dot answered this prompt with these checks, so they compare. A run that produced nothing still cost what it cost, and passed none of the checks.

How it is checked

Top to bottom: handle knob, crank, body, outer burr, inner burr, spring if drawn, adjustment dial, catch jar. The drive shaft runs through the body and both burrs, so it is left out of the order, the way the French press leaves out its rod. The adjustment is at the bottom, below the burrs, and the inner cone comes out downwards through the fixed outer ring. Checked against Comandante's FAQ for the C40, Coffeegeek on the Timemore C2, Hario's spare-parts list and a review for the Skerton Pro, and a guide to the Porlex Mini. The Skerton has no spring, so the spring is not required.

All eight partsby eyeHandle knob, crank, drive shaft, body, outer burr, inner burr, adjustment dial and catch jar all drawn and labelled.Pass if every listed part is drawn as a separate shape and each has a label naming it. A part only named in a label or a comment, with nothing drawn, fails it. The label must say what the part is, in any words: a name that only says where it sits ("top plate") or what it is made of, or a mention in another part's caption, does not count.

Stack ordermeasuredCrank, body, outer burr, inner burr, spring if drawn, adjustment, catch jar, top to bottom along the axis, read from each part's coordinates in the SVG.Fail if any two drawn parts come in the wrong order along the assembly axis, read from their coordinates in the SVG and never from comments or label text.

Parts fitby eyeThe inner burr nests inside the outer one, 70% to 95% of its inside width, and the outer burr is 90% to 100% of the body's.Pass if each listed pair of mating parts looks as if it would go together as stated: the right angle, nested inside, or sitting on top. One pair that plainly could not fails it.

One assembly axisby eyeBody, burrs, spring if drawn, adjustment and jar centred on one vertical axis, with leader lines to one side. The knob may sit off it on the end of the crank.Pass if one line runs through the middle of every part on each listed axis, and every leader line leaves from the same side. One part pushed off its axis fails it.

Labels matchby eyeEach label names the part it points at.Pass if following each leader line from its label ends on the part that label names. One label pointing at the wrong part, or at nothing, fails it.

A check decided by eye carries the rule I apply to it. I wrote those rules down on 21 September 2026, after the first results were scored, so for those results they record how I made the calls after the fact.

When this saturates: Draw the burrs in section with the gap set for espresso, so the cone and the ring have to be the right shapes as well as the right sizes.

Failures seen here: incomplete (fails when the model leaves out something the brief asked for); false (fails when the model gets a fact wrong, such as a part in the wrong place or at the wrong size). The same kinds across every task.

The rules behind all of this This task's prompt, checks and any checker, on GitHub