benchlm.ai

GPT-5 (medium) vs Kimi K2

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 23 (47 point difference).GPT-5 (medium) wins 4 out of 4 categories.

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Kimi K2

CreatorMoonshot AI
TypeProprietary
Context128K
Score23

Knowledge

GPT-5 (medium)

GPT-5 (medium)

88

Kimi K2

29.8

91
MMLU
32
89
GPQA
31
87
SuperGPQA
29
85
OpenBookQA
27

Coding

GPT-5 (medium)

GPT-5 (medium)

83

Kimi K2

24

83
HumanEval
24

Mathematics

GPT-5 (medium)

GPT-5 (medium)

92

Kimi K2

31

93
AIME 2023
32
95
AIME 2024
34
94
AIME 2025
33
89
HMMT Feb 2023
28
91
HMMT Feb 2024
30
90
HMMT Feb 2025
29
92
BRUMO 2025
31

Reasoning

GPT-5 (medium)

GPT-5 (medium)

86

Kimi K2

29

87
SimpleQA
30
85
MuSR
28

Frequently Asked Questions

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

GPT-5 (medium) scores higher overall with 70 vs 23, a difference of 47 points across all benchmarks.

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

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 29.8.

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

GPT-5 (medium) leads in coding with an average score of 83 vs 24.

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

GPT-5 (medium) leads in math with an average score of 92 vs 31.

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

GPT-5 (medium) leads in reasoning with an average score of 86 vs 29.

Related Comparisons

GPT-5 (medium) vs GPT-5.4GPT-5 (medium) vs Gemini 3.1 ProGPT-5 (medium) vs Claude Opus 4.6GPT-5 (medium) vs GPT-5.3 CodexGPT-5 (medium) vs Grok 4.1GPT-5 (medium) vs GPT-5.2