benchlm.ai

Claude 3 Opus vs GPT-5 mini

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 51 (17 point difference).GPT-5 mini wins 4 out of 4 categories.

Claude 3 Opus

CreatorAnthropic
TypeProprietary
Context200K
Score51

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Knowledge

GPT-5 mini

Claude 3 Opus

59.5

GPT-5 mini

85

61
MMLU
88
61
GPQA
86
59
SuperGPQA
84
57
OpenBookQA
82

Coding

GPT-5 mini

Claude 3 Opus

53

GPT-5 mini

80

53
HumanEval
80

Mathematics

GPT-5 mini

Claude 3 Opus

60

GPT-5 mini

89

61
AIME 2023
90
63
AIME 2024
92
62
AIME 2025
91
57
HMMT Feb 2023
86
59
HMMT Feb 2024
88
58
HMMT Feb 2025
87
60
BRUMO 2025
89

Reasoning

GPT-5 mini

Claude 3 Opus

58

GPT-5 mini

83

59
SimpleQA
84
57
MuSR
82

Frequently Asked Questions

Which is better, Claude 3 Opus or GPT-5 mini?

GPT-5 mini scores higher overall with 68 vs 51, a difference of 17 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Opus or GPT-5 mini?

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 59.5.

Which is better for coding, Claude 3 Opus or GPT-5 mini?

GPT-5 mini leads in coding with an average score of 80 vs 53.

Which is better for math, Claude 3 Opus or GPT-5 mini?

GPT-5 mini leads in math with an average score of 89 vs 60.

Which is better for reasoning, Claude 3 Opus or GPT-5 mini?

GPT-5 mini leads in reasoning with an average score of 83 vs 58.

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