benchlm.ai

Kimi K2.5 (Reasoning) vs Z-1

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

Kimi K2.5 (Reasoning) wins overall with a score of 71 vs 43 (28 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

Z-1

CreatorZ
TypeProprietary
Context128K
Score43

Knowledge

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

89

Z-1

49.8

92
MMLU
52
90
GPQA
51
88
SuperGPQA
49
86
OpenBookQA
47

Coding

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

84

Z-1

44

84
HumanEval
44

Mathematics

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

93

Z-1

51

94
AIME 2023
52
96
AIME 2024
54
95
AIME 2025
53
90
HMMT Feb 2023
48
92
HMMT Feb 2024
50
91
HMMT Feb 2025
49
93
BRUMO 2025
51

Reasoning

Kimi K2.5 (Reasoning)

Kimi K2.5 (Reasoning)

87

Z-1

49

88
SimpleQA
50
86
MuSR
48

Frequently Asked Questions

Which is better, Kimi K2.5 (Reasoning) or Z-1?

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 43, a difference of 28 points across all benchmarks.

Which is better for knowledge tasks, Kimi K2.5 (Reasoning) or Z-1?

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 49.8.

Which is better for coding, Kimi K2.5 (Reasoning) or Z-1?

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 44.

Which is better for math, Kimi K2.5 (Reasoning) or Z-1?

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 51.

Which is better for reasoning, Kimi K2.5 (Reasoning) or Z-1?

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 49.

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