GPT-4o vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 56 (11 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

GPT-4o

64.5

o3

85.3

66
MMLU
86
66
GPQA
87
64
SuperGPQA
85
62
OpenBookQA
83

Coding

o3

GPT-4o

58

o3

78

58
HumanEval
78

Mathematics

o3

GPT-4o

65

o3

87

66
AIME 2023
88
68
AIME 2024
90
67
AIME 2025
89
62
HMMT Feb 2023
84
64
HMMT Feb 2024
86
63
HMMT Feb 2025
85
65
BRUMO 2025
87

Reasoning

o3

GPT-4o

63

o3

83

64
SimpleQA
84
62
MuSR
82

Frequently Asked Questions

Which is better, GPT-4o or o3?

o3 scores higher overall with 67 vs 56, a difference of 11 points across all benchmarks.

Which is better for knowledge tasks, GPT-4o or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 64.5.

Which is better for coding, GPT-4o or o3?

o3 leads in coding with an average score of 78 vs 58.

Which is better for math, GPT-4o or o3?

o3 leads in math with an average score of 87 vs 65.

Which is better for reasoning, GPT-4o or o3?

o3 leads in reasoning with an average score of 83 vs 63.