benchlm.ai

Gemini 3 Flash vs GPT-5 (high)

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 58 (14 point difference).GPT-5 (high) wins 4 out of 4 categories.

Gemini 3 Flash

CreatorGoogle
TypeProprietary
Context1M
Score58

GPT-5 (high)

CreatorOpenAI
TypeProprietary
Context128K
Score72

Knowledge

GPT-5 (high)

Gemini 3 Flash

67.8

GPT-5 (high)

90

70
MMLU
93
69
GPQA
91
67
SuperGPQA
89
65
OpenBookQA
87

Coding

GPT-5 (high)

Gemini 3 Flash

62

GPT-5 (high)

85

62
HumanEval
85

Mathematics

GPT-5 (high)

Gemini 3 Flash

69

GPT-5 (high)

94

70
AIME 2023
95
72
AIME 2024
97
71
AIME 2025
96
66
HMMT Feb 2023
91
68
HMMT Feb 2024
93
67
HMMT Feb 2025
92
69
BRUMO 2025
94

Reasoning

GPT-5 (high)

Gemini 3 Flash

66

GPT-5 (high)

88

67
SimpleQA
89
65
MuSR
87

Frequently Asked Questions

Which is better, Gemini 3 Flash or GPT-5 (high)?

GPT-5 (high) scores higher overall with 72 vs 58, a difference of 14 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3 Flash or GPT-5 (high)?

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 67.8.

Which is better for coding, Gemini 3 Flash or GPT-5 (high)?

GPT-5 (high) leads in coding with an average score of 85 vs 62.

Which is better for math, Gemini 3 Flash or GPT-5 (high)?

GPT-5 (high) leads in math with an average score of 94 vs 69.

Which is better for reasoning, Gemini 3 Flash or GPT-5 (high)?

GPT-5 (high) leads in reasoning with an average score of 88 vs 66.

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