Gemini 3.1 Flash-Lite vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 53 (14 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Gemini 3.1 Flash-Lite

60.8

o3

85.3

63
MMLU
86
62
GPQA
87
60
SuperGPQA
85
58
OpenBookQA
83

Coding

o3

Gemini 3.1 Flash-Lite

55

o3

78

55
HumanEval
78

Mathematics

o3

Gemini 3.1 Flash-Lite

62

o3

87

63
AIME 2023
88
65
AIME 2024
90
64
AIME 2025
89
59
HMMT Feb 2023
84
61
HMMT Feb 2024
86
60
HMMT Feb 2025
85
62
BRUMO 2025
87

Reasoning

o3

Gemini 3.1 Flash-Lite

59

o3

83

60
SimpleQA
84
58
MuSR
82

Frequently Asked Questions

Which is better, Gemini 3.1 Flash-Lite or o3?

o3 scores higher overall with 67 vs 53, a difference of 14 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3.1 Flash-Lite or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 60.8.

Which is better for coding, Gemini 3.1 Flash-Lite or o3?

o3 leads in coding with an average score of 78 vs 55.

Which is better for math, Gemini 3.1 Flash-Lite or o3?

o3 leads in math with an average score of 87 vs 62.

Which is better for reasoning, Gemini 3.1 Flash-Lite or o3?

o3 leads in reasoning with an average score of 83 vs 59.