Gemini 3 Flash 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 58 (10 point difference).o3-pro wins 4 out of 4 categories.

Knowledge

o3-pro

Gemini 3 Flash

67.8

o3-pro

87.3

70
MMLU
88
69
GPQA
89
67
SuperGPQA
87
65
OpenBookQA
85

Coding

o3-pro

Gemini 3 Flash

62

o3-pro

80

62
HumanEval
80

Mathematics

o3-pro

Gemini 3 Flash

69

o3-pro

89

70
AIME 2023
90
72
AIME 2024
92
71
AIME 2025
91
66
HMMT Feb 2023
86
68
HMMT Feb 2024
88
67
HMMT Feb 2025
87
69
BRUMO 2025
89

Reasoning

o3-pro

Gemini 3 Flash

66

o3-pro

85

67
SimpleQA
86
65
MuSR
84

Frequently Asked Questions

Which is better, Gemini 3 Flash or o3-pro?

o3-pro scores higher overall with 68 vs 58, a difference of 10 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3 Flash or o3-pro?

o3-pro leads in knowledge tasks with an average score of 87.3 vs 67.8.

Which is better for coding, Gemini 3 Flash or o3-pro?

o3-pro leads in coding with an average score of 80 vs 62.

Which is better for math, Gemini 3 Flash or o3-pro?

o3-pro leads in math with an average score of 89 vs 69.

Which is better for reasoning, Gemini 3 Flash or o3-pro?

o3-pro leads in reasoning with an average score of 85 vs 66.