Gemini 2.5 Pro vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 65 (2 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Gemini 2.5 Pro

81.5

o3

85.3

83
MMLU
86
83
GPQA
87
81
SuperGPQA
85
79
OpenBookQA
83

Coding

o3

Gemini 2.5 Pro

75

o3

78

75
HumanEval
78

Mathematics

o3

Gemini 2.5 Pro

83

o3

87

84
AIME 2023
88
86
AIME 2024
90
85
AIME 2025
89
80
HMMT Feb 2023
84
82
HMMT Feb 2024
86
81
HMMT Feb 2025
85
83
BRUMO 2025
87

Reasoning

o3

Gemini 2.5 Pro

80

o3

83

81
SimpleQA
84
79
MuSR
82

Frequently Asked Questions

Which is better, Gemini 2.5 Pro or o3?

o3 scores higher overall with 67 vs 65, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Pro or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 81.5.

Which is better for coding, Gemini 2.5 Pro or o3?

o3 leads in coding with an average score of 78 vs 75.

Which is better for math, Gemini 2.5 Pro or o3?

o3 leads in math with an average score of 87 vs 83.

Which is better for reasoning, Gemini 2.5 Pro or o3?

o3 leads in reasoning with an average score of 83 vs 80.