Claude 3 Haiku vs o3-pro

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

Quick Verdict

o3-pro wins overall with a score of 68 vs 46 (22 point difference).o3-pro wins 4 out of 4 categories.

Knowledge

o3-pro

Claude 3 Haiku

54.5

o3-pro

87.3

56
MMLU
88
56
GPQA
89
54
SuperGPQA
87
52
OpenBookQA
85

Coding

o3-pro

Claude 3 Haiku

48

o3-pro

80

48
HumanEval
80

Mathematics

o3-pro

Claude 3 Haiku

55

o3-pro

89

56
AIME 2023
90
58
AIME 2024
92
57
AIME 2025
91
52
HMMT Feb 2023
86
54
HMMT Feb 2024
88
53
HMMT Feb 2025
87
55
BRUMO 2025
89

Reasoning

o3-pro

Claude 3 Haiku

53

o3-pro

85

54
SimpleQA
86
52
MuSR
84

Frequently Asked Questions

Which is better, Claude 3 Haiku or o3-pro?

o3-pro scores higher overall with 68 vs 46, a difference of 22 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Haiku or o3-pro?

o3-pro leads in knowledge tasks with an average score of 87.3 vs 54.5.

Which is better for coding, Claude 3 Haiku or o3-pro?

o3-pro leads in coding with an average score of 80 vs 48.

Which is better for math, Claude 3 Haiku or o3-pro?

o3-pro leads in math with an average score of 89 vs 55.

Which is better for reasoning, Claude 3 Haiku or o3-pro?

o3-pro leads in reasoning with an average score of 85 vs 53.