benchlm.ai

GPT-5 (medium) vs Kimi K2.5

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 62 (8 point difference).GPT-5 (medium) wins 4 out of 4 categories.

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Kimi K2.5

CreatorMoonshot AI
TypeOpen Weight
Context128K
Score62

Knowledge

GPT-5 (medium)

GPT-5 (medium)

88

Kimi K2.5

74.8

91
MMLU
77
89
GPQA
76
87
SuperGPQA
74
85
OpenBookQA
72

Coding

GPT-5 (medium)

GPT-5 (medium)

83

Kimi K2.5

69

83
HumanEval
69

Mathematics

GPT-5 (medium)

GPT-5 (medium)

92

Kimi K2.5

76

93
AIME 2023
77
95
AIME 2024
79
94
AIME 2025
78
89
HMMT Feb 2023
73
91
HMMT Feb 2024
75
90
HMMT Feb 2025
74
92
BRUMO 2025
76

Reasoning

GPT-5 (medium)

GPT-5 (medium)

86

Kimi K2.5

73

87
SimpleQA
74
85
MuSR
72

Frequently Asked Questions

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

GPT-5 (medium) scores higher overall with 70 vs 62, a difference of 8 points across all benchmarks.

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

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 74.8.

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

GPT-5 (medium) leads in coding with an average score of 83 vs 69.

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

GPT-5 (medium) leads in math with an average score of 92 vs 76.

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

GPT-5 (medium) leads in reasoning with an average score of 86 vs 73.

Related Comparisons

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