Domino
Released: 2026-03-30
Missing Domino:
google/gemini-3-flash-preview
After cataloging all the tiles present in the image (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, 5-5, 5-6), it is determined that the [6, 6] tile is missing from the 28-piece double-six set.
meta-llama/llama-4-maverick
meta
The image contains 27 domino tiles. Upon examining each tile, we can identify the numbers on each half. By comparing these to the complete set of 28 unique tiles in a standard double-six domino set, we find that the domino [2, 2] is missing.
anthropic/claude-haiku-4.5
anthropic
By systematically checking all 28 possible dominoes in a standard double-six set (every combination of numbers 0-6), the domino [4, 4] is not present in the image. All other 27 dominoes can be identified among the tiles shown.
anthropic/claude-sonnet-4.6
anthropic
After cataloging all visible dominoes in the image, I systematically checked each possible combination from the standard 28-tile double-six set. Going through all pairs (0,0), (0,1), (0,2), (0,3), (0,4), (0,5), (0,6), (1,1), (1,2)... etc., the domino showing 0 and 3 (blank and three dots) does not appear in the image, making it the excluded domino.
openai/gpt-5-image-mini
openai
I identified and listed all 27 tiles in the image and compared them to the complete double-six set; the only pair not shown is the domino with 4 and 5.
x-ai/grok-4-fast
x-ai
After examining all 27 dominoes in the image and comparing to the standard double-six set, the pair [4,6] is the only one missing.
moonshotai/kimi-k2.5
moonshot
In a complete double-six domino set, each number (0-6) appears exactly 8 times across all domino halves. After analyzing all 27 dominoes in the image, I counted the occurrences of each number: 1 appears 8 times, 2 appears 8 times, 3 appears 8 times, 4 appears 8 times, 5 appears 8 times, and 6 appears 8 times. However, the number 0 appears only 6 times. Since a missing double domino [a,a] would reduce the count of number a by exactly 2 (from 8 to 6), the missing domino must be [0,0]. Visual confirmation also shows no completely blank domino is present in the image.
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.