A serving tray where four tables will only take three drinks, by gpt-6.1-sol
gpt-6.1-sol · round 1 · seed 3$0.00reply.txt
reply.txt · 8 lines
I didn’t create `tray.svg` because no arrangement can satisfy all six tables.

- Tables **1 and 4** must take the two dairy drinks: the vanilla cortado and decaf cortado.
- Table **2** must then take the decaf oat vanilla latte—the only remaining decaf drink.
- That leaves **no vanilla drink for Table 3**.

At least one drink or table requirement must change before a correctly labeled tray is possible.
gallery/A serving tray where four tables will only take three drinks/GPT-6.1 Sol, run 3

A serving tray where four tables will only take three drinks: GPT-6.1 Sol

modelopenai/gpt-6.1-soltaskcup-allocation-impossible@v2, checks c1, harness h1date2026-11-08rounds0 of 8 allowed, 12 minutes on the clockcost$0.0011thinkingmediumtokens3,008 in, 287 out, of which 163 reasoningtime9 s
Says it cannot be donedecided by a number, from the filepass
Reuses nothingdecided by a number, from the filen/d

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 four tables will only take three drinks, by GPT-6.1 Sol, run 1run 1 · 0r · $0.0009A serving tray where four tables will only take three drinks, by GPT-6.1 Sol, run 2run 2 · 0r · $0.0012
same prompt, other modelsall 24 runs on A serving tray where four tables will only take three drinks →
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 dairy 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

Tables 1, 2, 3 and 4 together will only take the three drinks A, B and C, so no serving of all six exists, and the checker confirms that with its own perfect-matching solver. The right answer says so and draws nothing. Every table still has a drink it will take on its own, so the shortage is only visible across the tables together. How it is scored, and this run's files on GitHub.