benchlm.ai

Kimi K2 vs Kimi K2.5 (Reasoning)

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 23 (48 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Kimi K2

CreatorMoonshot AI
TypeProprietary
Context128K
Score23

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

Knowledge

Kimi K2.5 (Reasoning)

Kimi K2

29.8

Kimi K2.5 (Reasoning)

89

32
MMLU
92
31
GPQA
90
29
SuperGPQA
88
27
OpenBookQA
86

Coding

Kimi K2.5 (Reasoning)

Kimi K2

24

Kimi K2.5 (Reasoning)

84

24
HumanEval
84

Mathematics

Kimi K2.5 (Reasoning)

Kimi K2

31

Kimi K2.5 (Reasoning)

93

32
AIME 2023
94
34
AIME 2024
96
33
AIME 2025
95
28
HMMT Feb 2023
90
30
HMMT Feb 2024
92
29
HMMT Feb 2025
91
31
BRUMO 2025
93

Reasoning

Kimi K2.5 (Reasoning)

Kimi K2

29

Kimi K2.5 (Reasoning)

87

30
SimpleQA
88
28
MuSR
86

Frequently Asked Questions

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

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 23, a difference of 48 points across all benchmarks.

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

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 29.8.

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

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 24.

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

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 31.

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

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 29.

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