Domino
Released: 2026-04-01
Missing Domino:
meta-llama/llama-4-maverick
meta
The excluded domino is number 0 and 0
google/gemini-3-flash-preview
After counting all 27 dominoes present in the image and cross-referencing them against a full double-six set, the domino with values 1 and 6 is the only one missing.
anthropic/claude-haiku-4.5
anthropic
By systematically checking all 28 possible domino combinations in a standard double-six set, I identified all dominoes present in the image. The domino [2, 4] (or equivalently [4, 2]) is the only combination that does not appear among the 27 tiles shown.
anthropic/claude-sonnet-4.6
anthropic
I systematically catalogued all visible dominoes in the image and compared them against the full standard set of 28 dominoes (0-0 through 6-6). After identifying each tile, the domino [4,1] (one side with 4 pips and the other with 1 pip) was the only combination not found among the 27 dominoes shown.
openai/gpt-5-image-mini
openai
Scanning the 27 tiles in the image shows examples of blanks paired with other numbers (e.g. 0-3, 0-1, etc.), but there is no tile with blanks on both ends. Therefore the missing domino is the double-blank [0,0].
x-ai/grok-4-fast
x-ai
After counting the pips in all 54 halves shown, the number 3 appears 7 times and 4 appears 7 times, while all others appear 8 times. Thus, the missing domino is [3|4].
moonshotai/kimi-k2.5
moonshot
I identified all 27 dominoes in the image by counting dots on each tile. The complete list includes: [0,0], [0,1], [0,2], [0,3], [0,4], [0,5], [0,6], [1,1], [1,2], [1,3], [1,4], [1,5], [1,6], [2,2], [2,3], [2,4], [2,5], [2,6], [3,3], [3,4], [3,5], [3,6], [4,4], [4,5], [4,6], [5,6], [6,6]. Comparing against the standard 28 dominoes in a double-six set, the only missing tile is [5,5] (the double-five).
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.