Domino
Released: 2026-04-04
Missing Domino:
meta-llama/llama-4-maverick
meta
The excluded domino is number 2 and 6
google/gemini-3-flash-preview
A standard double-six set contains 28 tiles. By counting the tiles in the image, the following 27 tiles are present: [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], and [5,6]. The only tile from the standard 28-piece set missing is the double-six [6,6].
anthropic/claude-haiku-4.5
anthropic
By systematically cataloging all 27 visible dominoes in the image and comparing against the complete standard double-six set of 28 tiles (all combinations of 0-6), the domino [2, 4] is the only tile that does not appear in the image. All other 27 unique combinations are present.
anthropic/claude-sonnet-4.6
anthropic
By systematically going through all 28 dominoes in a standard double-six set and comparing with the image, I can identify each domino present. The full set includes all combinations from 0-0 to 6-6. After carefully counting the dots on each tile in the image, the domino [0,3] (blank/three) appears to be missing from the 27 tiles shown.
openai/gpt-5-image-mini
openai
I examined all 27 tiles in the image and could not find the double-six tile (6|6); every other domino from the double-six set is present.
x-ai/grok-4-fast
x-ai
Numbers 3 and 5 appear 6 times each in the provided dominoes, while all other numbers from 0 to 6 appear 7 times, indicating that the [3-5] domino is missing from the standard double-six set.
moonshotai/kimi-k2.5
moonshot
After systematically identifying all 27 dominoes visible in the image, I checked against the complete set of 28 standard double-six dominoes. I can verify the presence of all doubles except [0,0]: [1,1], [2,2], [3,3], [4,4], [5,5], and [6,6] are all visible. For the 0-series, I can identify [0,1], [0,2], [0,3], [0,4], [0,5], and [0,6] in various positions throughout the grid, but there is no domino with two blank (zero-dot) halves. The missing domino is [0,0].
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.