Domino
Released: 2026-02-20
Missing Domino:
meta-llama/llama-4-maverick
meta
The domino [0, 0] is missing from the set.
google/gemini-3-flash-preview
A full double-six set contains 28 tiles. Upon counting the visible tiles, 27 are present. Systematically checking each combination for numbers 0-6 reveals that the [0, 5] (blank-five) domino is missing from the image.
anthropic/claude-haiku-4.5
anthropic
By systematically identifying all 27 visible dominoes in the image and checking against the complete standard double-six set of 28 tiles, the domino [4, 4] is the only one not present. All other doubles [0,0], [1,1], [2,2], [3,3], [5,5], [6,6] are visible, as are all 21 non-double combinations.
moonshotai/kimi-k2.5
moonshot
I systematically checked all dominoes in the image against the complete set of 28 double-six dominoes. The complete set 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], [5,5], [5,6], [6,6]. After identifying all 27 dominoes in the image, I found that [1,1] (double-one) is the only domino missing from the set.
openai/gpt-5-image-mini
openai
The excluded domino is number 2 and 4
qwen/qwen3-vl-30b-a3b-thinking
qwen
In a standard double-six domino set, all pairs from 0-0 to 6-6 must be present. After analyzing the provided 27 dominoes, the only pair not found is [0, 0], as all other combinations (including doubles like [1,1] to [6,6] and non-doubles) are represented in the image.
x-ai/grok-4-fast
x-ai
After identifying all 27 dominoes in the image and comparing to the standard double-six set of 28, the [3|5] domino is the only one absent. Counts show 3 and 5 each appear on 6 tiles instead of 7.
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.