Domino
Released: 2026-09-07
Missing Domino:
anthropic/claude-haiku-4.5
anthropic
By systematically analyzing all 27 dominoes visible in the image and checking against the 28 tiles in a standard double-six domino set, the domino [0, 4] (or equivalently [4, 0]) is the only one missing from the complete set.
meta-llama/llama-4-maverick
meta
The excluded domino is number 2 and 1
google/gemini-3-flash-preview
By systematically checking every possible combination in a standard double-six set, which contains 28 tiles from [0,0] to [6,6], the blank-blank tile [0,0] is the only one not present among the 27 tiles displayed in the image.
openai/gpt-5-image-mini
openai
I counted the occurrences of each pip value on the 27 visible tiles. Values 2 and 5 each appear one time fewer than expected in a full double-six set (7 instead of 8), so the missing tile must be the [2,5] domino.
moonshotai/kimi-k2.5
moonshot
By counting the occurrences of blank (zero) halves among all visible dominoes, I identified 6 blank halves total. These belong to the dominoes: [0,1], [0,2], [0,3], [0,4], [0,5], and [0,6]. In a complete double-six set, the number 0 appears 8 times: twice in [0,0] and once in each of [0,1], [0,2], [0,3], [0,4], [0,5], and [0,6]. Since only 6 zeros are present, and all other 0-x dominoes ([0,1] through [0,6]) account for exactly 6 zeros (one each), the missing domino must be [0,0], which would account for the remaining 2 zero appearances.
Methodology Note
Each model receives the same domino puzzle grid. Models are tasked with identifying the missing domino using only visual clues from the grid. Their answers are evaluated without feedback or retries.