benchlm.ai

Gemini 3 Pro vs o3

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

Quick Verdict

Gemini 3 Pro wins overall with a score of 78 vs 67 (11 point difference).Gemini 3 Pro wins 4 out of 4 categories.

Gemini 3 Pro

CreatorGoogle
TypeProprietary
Context2M
Score78

o3

CreatorOpenAI
TypeProprietary
Context200K
Score67

Knowledge

Gemini 3 Pro

Gemini 3 Pro

96

o3

85.3

99
MMLU
86
97
GPQA
87
95
SuperGPQA
85
93
OpenBookQA
83

Coding

Gemini 3 Pro

Gemini 3 Pro

91

o3

78

91
HumanEval
78

Mathematics

Gemini 3 Pro

Gemini 3 Pro

97.1

o3

87

99
AIME 2023
88
99
AIME 2024
90
98
AIME 2025
89
95
HMMT Feb 2023
84
97
HMMT Feb 2024
86
96
HMMT Feb 2025
85
96
BRUMO 2025
87

Reasoning

Gemini 3 Pro

Gemini 3 Pro

94

o3

83

95
SimpleQA
84
93
MuSR
82

Frequently Asked Questions

Which is better, Gemini 3 Pro or o3?

Gemini 3 Pro scores higher overall with 78 vs 67, a difference of 11 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3 Pro or o3?

Gemini 3 Pro leads in knowledge tasks with an average score of 96 vs 85.3.

Which is better for coding, Gemini 3 Pro or o3?

Gemini 3 Pro leads in coding with an average score of 91 vs 78.

Which is better for math, Gemini 3 Pro or o3?

Gemini 3 Pro leads in math with an average score of 97.1 vs 87.

Which is better for reasoning, Gemini 3 Pro or o3?

Gemini 3 Pro leads in reasoning with an average score of 94 vs 83.

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