Claude 3 Opus vs GPT-5 (high)

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 51 (21 point difference).GPT-5 (high) wins 4 out of 4 categories.

Knowledge

GPT-5 (high)

Claude 3 Opus

59.5

GPT-5 (high)

90

61
MMLU
93
61
GPQA
91
59
SuperGPQA
89
57
OpenBookQA
87

Coding

GPT-5 (high)

Claude 3 Opus

53

GPT-5 (high)

85

53
HumanEval
85

Mathematics

GPT-5 (high)

Claude 3 Opus

60

GPT-5 (high)

94

61
AIME 2023
95
63
AIME 2024
97
62
AIME 2025
96
57
HMMT Feb 2023
91
59
HMMT Feb 2024
93
58
HMMT Feb 2025
92
60
BRUMO 2025
94

Reasoning

GPT-5 (high)

Claude 3 Opus

58

GPT-5 (high)

88

59
SimpleQA
89
57
MuSR
87

Frequently Asked Questions

Which is better, Claude 3 Opus or GPT-5 (high)?

GPT-5 (high) scores higher overall with 72 vs 51, a difference of 21 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Opus or GPT-5 (high)?

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 59.5.

Which is better for coding, Claude 3 Opus or GPT-5 (high)?

GPT-5 (high) leads in coding with an average score of 85 vs 53.

Which is better for math, Claude 3 Opus or GPT-5 (high)?

GPT-5 (high) leads in math with an average score of 94 vs 60.

Which is better for reasoning, Claude 3 Opus or GPT-5 (high)?

GPT-5 (high) leads in reasoning with an average score of 88 vs 58.