GPT-5 (high) vs o3-pro

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 68 (4 point difference).GPT-5 (high) wins 4 out of 4 categories.

Knowledge

GPT-5 (high)

GPT-5 (high)

90

o3-pro

87.3

93
MMLU
88
91
GPQA
89
89
SuperGPQA
87
87
OpenBookQA
85

Coding

GPT-5 (high)

GPT-5 (high)

85

o3-pro

80

85
HumanEval
80

Mathematics

GPT-5 (high)

GPT-5 (high)

94

o3-pro

89

95
AIME 2023
90
97
AIME 2024
92
96
AIME 2025
91
91
HMMT Feb 2023
86
93
HMMT Feb 2024
88
92
HMMT Feb 2025
87
94
BRUMO 2025
89

Reasoning

GPT-5 (high)

GPT-5 (high)

88

o3-pro

85

89
SimpleQA
86
87
MuSR
84

Frequently Asked Questions

Which is better, GPT-5 (high) or o3-pro?

GPT-5 (high) scores higher overall with 72 vs 68, a difference of 4 points across all benchmarks.

Which is better for knowledge tasks, GPT-5 (high) or o3-pro?

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 87.3.

Which is better for coding, GPT-5 (high) or o3-pro?

GPT-5 (high) leads in coding with an average score of 85 vs 80.

Which is better for math, GPT-5 (high) or o3-pro?

GPT-5 (high) leads in math with an average score of 94 vs 89.

Which is better for reasoning, GPT-5 (high) or o3-pro?

GPT-5 (high) leads in reasoning with an average score of 88 vs 85.