benchlm.ai

Claude 3.5 Sonnet 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 55 (16 point difference).Kimi K2.5 (Reasoning) wins 4 out of 4 categories.

Claude 3.5 Sonnet

CreatorAnthropic
TypeProprietary
Context200K
Score55

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

Knowledge

Kimi K2.5 (Reasoning)

Claude 3.5 Sonnet

63.5

Kimi K2.5 (Reasoning)

89

65
MMLU
92
65
GPQA
90
63
SuperGPQA
88
61
OpenBookQA
86

Coding

Kimi K2.5 (Reasoning)

Claude 3.5 Sonnet

57

Kimi K2.5 (Reasoning)

84

57
HumanEval
84

Mathematics

Kimi K2.5 (Reasoning)

Claude 3.5 Sonnet

64

Kimi K2.5 (Reasoning)

93

65
AIME 2023
94
67
AIME 2024
96
66
AIME 2025
95
61
HMMT Feb 2023
90
63
HMMT Feb 2024
92
62
HMMT Feb 2025
91
64
BRUMO 2025
93

Reasoning

Kimi K2.5 (Reasoning)

Claude 3.5 Sonnet

62

Kimi K2.5 (Reasoning)

87

63
SimpleQA
88
61
MuSR
86

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) scores higher overall with 71 vs 55, a difference of 16 points across all benchmarks.

Which is better for knowledge tasks, Claude 3.5 Sonnet or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) leads in knowledge tasks with an average score of 89 vs 63.5.

Which is better for coding, Claude 3.5 Sonnet or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) leads in coding with an average score of 84 vs 57.

Which is better for math, Claude 3.5 Sonnet or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) leads in math with an average score of 93 vs 64.

Which is better for reasoning, Claude 3.5 Sonnet or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) leads in reasoning with an average score of 87 vs 62.

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