Domino
Released: 2026-04-25
Missing Domino:
google/gemini-3-flash-preview
A standard double-six domino set consists of 28 unique tiles ranging from 0-0 to 6-6. By counting the tiles in the image, there are 27 tiles present. After systematic tallying of all possible combinations, the [6, 6] tile (double six) is the only one missing from the complete set.
meta-llama/llama-4-maverick
meta
The excluded domino is number 2 and 1
anthropic/claude-sonnet-4.6
anthropic
By systematically cataloguing all visible dominoes in the image and comparing them to a complete standard double-six set (which contains all combinations from 0-0 to 6-6), the domino [0,3] (blank/three) is the one not present among the 27 shown tiles.
anthropic/claude-haiku-4.5
anthropic
By systematically checking all 28 possible dominoes in a standard double-six set against the 27 visible dominoes in the image, the domino [2, 4] is the only one that does not appear. All other combinations from [0, 0] through [6, 6] are present in the displayed set.
x-ai/grok-4-fast
x-ai
After carefully analyzing the positions and pip counts on each of the 27 dominoes shown in the image, all unique pairs from the double-six set are accounted for except for the [3,5] domino.
openai/gpt-5-image-mini
openai
After checking all tiles, the counts of pips show the numbers 4 and 5 each appear one fewer time than they should in a full set, so the missing domino is 4 and 5.
moonshotai/kimi-k2.5
moonshot
A standard double-six domino set contains 28 tiles. By systematically identifying all 27 visible dominoes in the image, I can determine which one is absent. The doubles [0,0], [1,1], [2,2], [3,3], [4,4], [5,5], and [6,6] are all present. Among dominoes with 0 pips, [0,0], [0,1], and [0,2] are clearly visible. The dominoes [0,4], [0,5], and [0,6] are also present in the image (as vertical or horizontal tiles with one blank half and one half showing 4, 5, or 6 pips respectively). However, the domino [0,3] - which would show one blank half and one half with 3 pips - is nowhere to be found in the set. All other dominoes in the standard set can be accounted for among the 27 tiles shown.
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.