benchlm.ai

Claude Opus 4.5 vs Kimi K2.5

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

Quick Verdict

Claude Opus 4.5 wins overall with a score of 79 vs 62 (17 point difference).Claude Opus 4.5 wins 4 out of 4 categories.

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

Kimi K2.5

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score62

Knowledge

Claude Opus 4.5

Claude Opus 4.5

96

Kimi K2.5

74.8

99
MMLU
77
97
GPQA
76
95
SuperGPQA
74
93
OpenBookQA
72

Coding

Claude Opus 4.5

Claude Opus 4.5

91

Kimi K2.5

69

91
HumanEval
69

Mathematics

Claude Opus 4.5

Claude Opus 4.5

97.1

Kimi K2.5

76

99
AIME 2023
77
99
AIME 2024
79
98
AIME 2025
78
95
HMMT Feb 2023
73
97
HMMT Feb 2024
75
96
HMMT Feb 2025
74
96
BRUMO 2025
76

Reasoning

Claude Opus 4.5

Claude Opus 4.5

94

Kimi K2.5

73

95
SimpleQA
74
93
MuSR
72

Frequently Asked Questions

Which is better, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 scores higher overall with 79 vs 62, a difference of 17 points across all benchmarks.

Which is better for knowledge tasks, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 leads in knowledge tasks with an average score of 96 vs 74.8.

Which is better for coding, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 leads in coding with an average score of 91 vs 69.

Which is better for math, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 leads in math with an average score of 97.1 vs 76.

Which is better for reasoning, Claude Opus 4.5 or Kimi K2.5?

Claude Opus 4.5 leads in reasoning with an average score of 94 vs 73.

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