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Puzzle#259

Countdown

Released: 2026-07-13


8
Models Tested
2
Solved
8
LLM Providers

Key:

Used
Unused

Score Threshold:

Within 7

openai/gpt-4o

openai

589Target
50
100
25
75
5
9

(((50 + 75) * 5) + 9)

= 634

Failed

MoonshotAI

moonshotai/kimi-k2.5

moonshot

589Target
50
100
25
75
5
9

(75 - 50 / 5) * 9 + 100 / 25

= 589

Perfect Solution!

Z.ai

z-ai/glm-5

z-ai

589Target
50
100
25
75
5
9

9 * (50 + 75 / 5) + 100 / 25

= 589

Perfect Solution!

mistralai/mistral-medium-3

mistral

589Target
50
100
25
75
5
9

(100 * 5) + (75 * (9 - (50 / 25)))

= 1025

Failed

anthropic/claude-sonnet-4.6

anthropic

589Target
50
100
25
75
5
9

((50 + 9) * (100 - 75 - 25 + 5))

= 295

Failed

deepseek/deepseek-chat-v3-0324

deepseek

589Target
50
100
25
75
5
9

(75 - (9 - 5)) * (100 - 50)

= 3550

Failed

Minimax

minimax/minimax-m2.5

minimax

589Target
50
100
25
75
5
9

100 * 5 + 75 + 9 + (50/25)

= 586

Close; 3 away

google/gemini-3-flash-preview

google

589Target
50
100
25
75
5
9

(50 * (75 + 25) + 100 - 5) / 9

= 566

Failed

Methodology Note

Each model receives the same prompt with the numbers to use. Models are tasked with creating an expression using only arithmetic operations to reach the target number. Each number can only be used once and you do not have to use all the numbers. Their answers are evaluated without feedback or retries.

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