Domino
Released: 2026-04-19
Missing Domino:
meta-llama/llama-4-maverick
meta
The excluded domino is number 2 and 6
anthropic/claude-haiku-4.5
anthropic
By systematically cataloging all 27 visible dominoes in the image and comparing them against the 28 tiles in a standard double-six set, the domino [2, 4] is the only tile that appears in the complete set but is missing from this collection.
google/gemini-3-flash-preview
After cataloging all 27 visible dominoes in the image, the list is: [3,4], [1,3], [3,5], [1,4], [0,6], [4,6], [3,6], [6,6], [3,3], [1,1], [1,5], [2,3], [0,2], [4,5], [4,4], [5,5], [1,6], [0,3], [1,2], [2,5], [2,4], [0,0], [0,4], [0,5], [2,2], [2,6], [5,6]. Comparing this to a complete double-six set, the [0,1] domino is the only one missing.
anthropic/claude-sonnet-4.6
anthropic
I systematically identified all 28 dominoes in a standard double-six set and compared them to the image. After cataloging all visible dominoes, the [0,0] blank-blank domino appears to be missing from the set.
openai/gpt-5-image-mini
openai
I examined the 27 shown tiles and found every combination of pips from 0–6 except the double six; there is no tile with six pips on both ends, so the missing domino is [6,6].
x-ai/grok-4-fast
x-ai
By counting the occurrences of each number across all halves of the 27 dominoes, the numbers 0,1,2,4, and 6 each appear 8 times, while 3 and 5 each appear 7 times, indicating the missing domino is [3,5].
moonshotai/kimi-k2.5
moonshot
By systematically identifying all 27 dominoes in the image and counting the occurrences of each number (0-6), the domino [0,1] is found to be missing. In a standard double-six set, each number should appear exactly 8 times across all domino halves. Counting the visible dominoes, the number 0 appears 7 times and the number 1 appears 7 times, indicating that the domino containing both [0,1] is the missing tile. All other dominoes in the standard set are accounted for 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.