benchlm.ai

Gemini 2.5 Flash vs GPT-5 (medium)

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 41 (29 point difference).GPT-5 (medium) wins 4 out of 4 categories.

Gemini 2.5 Flash

CreatorGoogle
TypeProprietary
Context1M
Score41

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Knowledge

GPT-5 (medium)

Gemini 2.5 Flash

47.8

GPT-5 (medium)

88

50
MMLU
91
49
GPQA
89
47
SuperGPQA
87
45
OpenBookQA
85

Coding

GPT-5 (medium)

Gemini 2.5 Flash

42

GPT-5 (medium)

83

42
HumanEval
83

Mathematics

GPT-5 (medium)

Gemini 2.5 Flash

49

GPT-5 (medium)

92

50
AIME 2023
93
52
AIME 2024
95
51
AIME 2025
94
46
HMMT Feb 2023
89
48
HMMT Feb 2024
91
47
HMMT Feb 2025
90
49
BRUMO 2025
92

Reasoning

GPT-5 (medium)

Gemini 2.5 Flash

47

GPT-5 (medium)

86

48
SimpleQA
87
46
MuSR
85

Frequently Asked Questions

Which is better, Gemini 2.5 Flash or GPT-5 (medium)?

GPT-5 (medium) scores higher overall with 70 vs 41, a difference of 29 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Flash or GPT-5 (medium)?

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 47.8.

Which is better for coding, Gemini 2.5 Flash or GPT-5 (medium)?

GPT-5 (medium) leads in coding with an average score of 83 vs 42.

Which is better for math, Gemini 2.5 Flash or GPT-5 (medium)?

GPT-5 (medium) leads in math with an average score of 92 vs 49.

Which is better for reasoning, Gemini 2.5 Flash or GPT-5 (medium)?

GPT-5 (medium) leads in reasoning with an average score of 86 vs 47.

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