benchlm.ai

GPT-5 (high) vs Kimi K2.5 (Reasoning)

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 71 (1 point difference).GPT-5 (high) wins 4 out of 4 categories.

GPT-5 (high)

CreatorOpenAI
TypeProprietary
Context128K
Score72

Kimi K2.5 (Reasoning)

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score71

Knowledge

GPT-5 (high)

GPT-5 (high)

90

Kimi K2.5 (Reasoning)

89

93
MMLU
92
91
GPQA
90
89
SuperGPQA
88
87
OpenBookQA
86

Coding

GPT-5 (high)

GPT-5 (high)

85

Kimi K2.5 (Reasoning)

84

85
HumanEval
84

Mathematics

GPT-5 (high)

GPT-5 (high)

94

Kimi K2.5 (Reasoning)

93

95
AIME 2023
94
97
AIME 2024
96
96
AIME 2025
95
91
HMMT Feb 2023
90
93
HMMT Feb 2024
92
92
HMMT Feb 2025
91
94
BRUMO 2025
93

Reasoning

GPT-5 (high)

GPT-5 (high)

88

Kimi K2.5 (Reasoning)

87

89
SimpleQA
88
87
MuSR
86

Frequently Asked Questions

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

GPT-5 (high) scores higher overall with 72 vs 71, a difference of 1 points across all benchmarks.

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

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 89.

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

GPT-5 (high) leads in coding with an average score of 85 vs 84.

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

GPT-5 (high) leads in math with an average score of 94 vs 93.

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

GPT-5 (high) leads in reasoning with an average score of 88 vs 87.

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