A serving tray where every table gets a drink it will take, by claude-opus-5.5
claude-opus-5.5 · round 1 · seed 1$0.01SVGPNGtray.svg
tray.svg · 49 lines
<svg xmlns="http://www.w3.org/2000/svg" width="900" height="560" viewBox="0 0 900 560" font-family="Helvetica, Arial, sans-serif">
<rect width="900" height="560" fill="#f4efe6"/>
<text x="450" y="40" text-anchor="middle" font-size="26" font-weight="bold" fill="#3b2a1a">Order Tray</text>
<rect x="40" y="65" width="820" height="440" rx="40" fill="#8a5a33" stroke="#5c3a1e" stroke-width="6"/>
<rect x="60" y="85" width="780" height="400" rx="28" fill="#a06c40"/>
<g id="cups" text-anchor="middle">
 <!-- row 1 -->
 <g transform="translate(190,190)">
  <circle r="80" fill="#fff" stroke="#555" stroke-width="3"/><circle r="62" fill="#e8cfa8"/>
  <text y="-12" font-size="30" font-weight="bold" fill="#222">Table 1</text>
  <text y="16" font-size="17" fill="#222">Vanilla cortado</text>
  <text y="38" font-size="13" fill="#444">dairy · vanilla · hot</text>
 </g>
 <g transform="translate(450,190)">
  <circle r="80" fill="#fff" stroke="#555" stroke-width="3"/><circle r="62" fill="#e8cfa8"/>
  <text y="-12" font-size="30" font-weight="bold" fill="#222">Table 2</text>
  <text y="16" font-size="17" fill="#222">Decaf cortado</text>
  <text y="38" font-size="13" fill="#444">dairy · decaf · hot</text>
 </g>
 <g transform="translate(710,190)">
  <circle r="80" fill="#fff" stroke="#555" stroke-width="3"/><circle r="62" fill="#efe2c8"/>
  <text y="-14" font-size="30" font-weight="bold" fill="#222">Table 3</text>
  <text y="10" font-size="15" fill="#222">Decaf oat</text>
  <text y="28" font-size="15" fill="#222">vanilla latte</text>
  <text y="46" font-size="11" fill="#444">oat · decaf · vanilla · hot</text>
 </g>
 <!-- row 2 -->
 <g transform="translate(190,380)">
  <circle r="80" fill="#dff1fb" stroke="#4a7fa0" stroke-width="3"/><circle r="62" fill="#e9dcc3"/>
  <text y="-12" font-size="30" font-weight="bold" fill="#222">Table 4</text>
  <text y="16" font-size="17" fill="#222">Iced oat latte</text>
  <text y="38" font-size="13" fill="#444">oat · cold</text>
 </g>
 <g transform="translate(450,380)">
  <circle r="80" fill="#dff1fb" stroke="#4a7fa0" stroke-width="3"/><circle r="62" fill="#6b4226"/>
  <text y="-12" font-size="30" font-weight="bold" fill="#fff">Table 5</text>
  <text y="16" font-size="17" fill="#fff">Cold brew</text>
  <text y="38" font-size="13" fill="#f0e0d0">black · cold</text>
 </g>
 <g transform="translate(710,380)">
  <circle r="80" fill="#fff" stroke="#555" stroke-width="3"/><circle r="62" fill="#4a2c17"/>
  <text y="-12" font-size="30" font-weight="bold" fill="#fff">Table 6</text>
  <text y="16" font-size="17" fill="#fff">Filter coffee</text>
  <text y="38" font-size="13" fill="#f0e0d0">black · hot</text>
 </g>
</g>
<text x="450" y="535" text-anchor="middle" font-size="14" fill="#3b2a1a">Blue-rimmed cups = cold drinks. Each table gets exactly one drink.</text>
</svg>
gallery/A serving tray where every table gets a drink it will take/Opus 5.5, run 1

A serving tray where every table gets a drink it will take: Opus 5.5

modelanthropic/claude-opus-5.5taskcup-allocation@v2, checks c1, harness h1date2026-11-08rounds1 of 8 allowed, 12 minutes on the clockcost$0.0103thinkingmediumtokens12,546 in, 3,232 out, of which 1,272 reasoningtime34 s
Serves all sixdecided 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
A serving tray where every table gets a drink it will take, by Opus 5.5, run 2run 2 · 1r · $0.0091A serving tray where every table gets a drink it will take, by Opus 5.5, run 3run 3 · 2r · $0.0138
same prompt, other modelsall 21 runs on A serving tray where every table gets a drink it will take →
the prompt it was given
I'm a barista and I have six drinks ready to go out: - Vanilla cortado: dairy milk, vanilla syrup, hot - Decaf cortado: dairy milk, decaf, hot - Decaf oat vanilla latte: oat milk, decaf, vanilla syrup, hot - Iced oat latte: oat milk, cold - Cold brew: black, cold - Filter coffee: black, hot There are six tables, and each one has asked for something: - Table 1 only drinks dairy milk - Table 2 wants decaf - Table 3 wants vanilla - Table 4 wants oat milk - Table 5 wants something cold - Table 6 wants black coffee Each table gets one drink. Each drink goes to one table. Draw the tray as tray.svg. Label every cup with its table number and the drink's name.
Frozen at v2. This model got this and nothing else.
ground truth

Six drinks with fixed attributes, six tables with fixed notes, one tray. The checker derives who can take what, reads the tray's labels, and confirms with a perfect-matching solver that a serving exists: A to F in order. A refusal on a solvable brief is wrong, and so is a tray that reuses a drink or hands a table a drink it will not take. Whether a drawn cup really holds what its label says is the eye's. How it is scored, and this run's files on GitHub.