Domino
Released: 2026-02-19
Missing Domino:
anthropic/claude-haiku-4.5
anthropic
By systematically identifying all 27 dominoes present in the image and comparing them against the complete set of 28 tiles in a standard double-six domino set, the missing domino is [4, 4]. All other double and non-double combinations from [0,0] through [6,6] are accounted for.
meta-llama/llama-4-maverick
meta
The excluded domino is number 0 and 0
google/gemini-3-flash-preview
A standard double-six domino set consists of 28 tiles. By cataloging all tiles present in the image: doubles ([0,0], [1,1], [2,2], [3,3], [4,4], [5,5], [6,6]), zeros ([0,1], [0,2], [0,3], [0,5], [0,6]), ones ([1,2], [1,3], [1,4], [1,5], [1,6]), twos ([2,3], [2,4], [2,5], [2,6]), threes ([3,4], [3,5], [3,6]), fours ([4,5], [4,6]), and fives ([5,6]), the only tile missing from the set is the [0,4] (Blank-Four) domino.
openai/gpt-5-image-mini
openai
The domino showing 4 and 6 is not present among the 27 tiles in the image.
x-ai/grok-4-fast
x-ai
By counting the occurrences of each number across all halves of the 27 dominoes, numbers 0 through 3 and 5 appear 8 times each, while 4 and 6 appear 7 times each. This indicates the missing domino is [4|6].
qwen/qwen3-vl-30b-a3b-thinking
qwen
The standard double-six set has 28 unique dominoes. By checking all pairs from 0-0 to 6-6, the only domino not present in the image is [3,6].
moonshotai/kimi-k2.5
moonshot
A standard double-six domino set contains 28 unique tiles. By systematically identifying all visible dominoes in the image, I can account for 27 tiles. Looking at the dominoes containing the number 5: [0,5], [1,5], [2,5], [3,5], [4,5], and [5,5] are all clearly present in the image. The only domino with a 5 that is missing is [5,6]. Additionally, checking the dominoes with 6: [0,6], [1,6], [2,6], [3,6], [4,6], and [6,6] are all present, leaving [5,6] as the only missing tile from the complete set.
google/gemini-3.1-pro-preview
By cataloging all the dominoes present in the image and checking them off against a complete standard double-six set of 28 tiles, the [2, 2] domino is missing. Notably, all other double dominoes (0-0, 1-1, 3-3, 4-4, 5-5, and 6-6) are clearly visible in the set, making the double-two the intentionally excluded domino.
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.