benchlm.ai

Gemini 3 Pro Deep Think vs o3

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

Quick Verdict

Gemini 3 Pro Deep Think wins overall with a score of 81 vs 67 (14 point difference).Gemini 3 Pro Deep Think wins 4 out of 4 categories.

Gemini 3 Pro Deep Think

CreatorGoogle
TypeProprietary
Context2M
Score81

o3

CreatorOpenAI
TypeProprietary
Context200K
Score67

Knowledge

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

96

o3

85.3

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

Coding

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

91

o3

78

91
HumanEval
78

Mathematics

Gemini 3 Pro Deep Think

Gemini 3 Pro Deep Think

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 Deep Think

Gemini 3 Pro Deep Think

94

o3

83

95
SimpleQA
84
93
MuSR
82

Frequently Asked Questions

Which is better, Gemini 3 Pro Deep Think or o3?

Gemini 3 Pro Deep Think scores higher overall with 81 vs 67, a difference of 14 points across all benchmarks.

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

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

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

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

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

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

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

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

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