Claude 4 Sonnet vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 59 (8 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Claude 4 Sonnet

71.5

o3

85.3

73
MMLU
86
73
GPQA
87
71
SuperGPQA
85
69
OpenBookQA
83

Coding

o3

Claude 4 Sonnet

65

o3

78

65
HumanEval
78

Mathematics

o3

Claude 4 Sonnet

72

o3

87

73
AIME 2023
88
75
AIME 2024
90
74
AIME 2025
89
69
HMMT Feb 2023
84
71
HMMT Feb 2024
86
70
HMMT Feb 2025
85
72
BRUMO 2025
87

Reasoning

o3

Claude 4 Sonnet

70

o3

83

71
SimpleQA
84
69
MuSR
82

Frequently Asked Questions

Which is better, Claude 4 Sonnet or o3?

o3 scores higher overall with 67 vs 59, a difference of 8 points across all benchmarks.

Which is better for knowledge tasks, Claude 4 Sonnet or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 71.5.

Which is better for coding, Claude 4 Sonnet or o3?

o3 leads in coding with an average score of 78 vs 65.

Which is better for math, Claude 4 Sonnet or o3?

o3 leads in math with an average score of 87 vs 72.

Which is better for reasoning, Claude 4 Sonnet or o3?

o3 leads in reasoning with an average score of 83 vs 70.