A serving tray where four tables will only take three drinks, by gpt-6.1-sol
gpt-6.1-sol · round 1 · seed 1$0.00reply.txt
reply.txt · 6 lines
I didn’t create `tray.svg` because no assignment satisfies all six tables.

Tables 1 and 4 must receive the two dairy drinks: the vanilla cortado and decaf cortado. That leaves the **decaf oat vanilla latte** as both the only remaining decaf drink for Table 2 and the only remaining vanilla drink for Table 3—but it cannot go to both.

One drink or one table’s requirement must change before a valid tray can be drawn.
gallery/A serving tray where four tables will only take three drinks/GPT-6.1 Sol, run 1

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$0.0009thinkingmediumtokens3,172 in, 235 out, of which 101 reasoningtime8 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 2run 2 · 0r · $0.0012A serving tray where four tables will only take three drinks, by GPT-6.1 Sol, run 3run 3 · 0r · $0.0011
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.