benchlm.ai

Gemini 3 Flash vs GPT-5 mini

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

Quick Verdict

GPT-5 mini wins overall with a score of 68 vs 58 (10 point difference).GPT-5 mini wins 4 out of 4 categories.

Gemini 3 Flash

CreatorGoogle
TypeProprietary
Context1M
Score58

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Knowledge

GPT-5 mini

Gemini 3 Flash

67.8

GPT-5 mini

85

70
MMLU
88
69
GPQA
86
67
SuperGPQA
84
65
OpenBookQA
82

Coding

GPT-5 mini

Gemini 3 Flash

62

GPT-5 mini

80

62
HumanEval
80

Mathematics

GPT-5 mini

Gemini 3 Flash

69

GPT-5 mini

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

GPT-5 mini

Gemini 3 Flash

66

GPT-5 mini

83

67
SimpleQA
84
65
MuSR
82

Frequently Asked Questions

Which is better, Gemini 3 Flash or GPT-5 mini?

GPT-5 mini 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 GPT-5 mini?

GPT-5 mini leads in knowledge tasks with an average score of 85 vs 67.8.

Which is better for coding, Gemini 3 Flash or GPT-5 mini?

GPT-5 mini leads in coding with an average score of 80 vs 62.

Which is better for math, Gemini 3 Flash or GPT-5 mini?

GPT-5 mini leads in math with an average score of 89 vs 69.

Which is better for reasoning, Gemini 3 Flash or GPT-5 mini?

GPT-5 mini leads in reasoning with an average score of 83 vs 66.

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