benchlm.ai

Gemini 2.5 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 41 (31 point difference).GPT-5 (high) wins 4 out of 4 categories.

Gemini 2.5 Flash

CreatorGoogle
TypeProprietary
Context1M
Score41

GPT-5 (high)

CreatorOpenAI
TypeProprietary
Context128K
Score72

Knowledge

GPT-5 (high)

Gemini 2.5 Flash

47.8

GPT-5 (high)

90

50
MMLU
93
49
GPQA
91
47
SuperGPQA
89
45
OpenBookQA
87

Coding

GPT-5 (high)

Gemini 2.5 Flash

42

GPT-5 (high)

85

42
HumanEval
85

Mathematics

GPT-5 (high)

Gemini 2.5 Flash

49

GPT-5 (high)

94

50
AIME 2023
95
52
AIME 2024
97
51
AIME 2025
96
46
HMMT Feb 2023
91
48
HMMT Feb 2024
93
47
HMMT Feb 2025
92
49
BRUMO 2025
94

Reasoning

GPT-5 (high)

Gemini 2.5 Flash

47

GPT-5 (high)

88

48
SimpleQA
89
46
MuSR
87

Frequently Asked Questions

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

GPT-5 (high) scores higher overall with 72 vs 41, a difference of 31 points across all benchmarks.

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

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 47.8.

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

GPT-5 (high) leads in coding with an average score of 85 vs 42.

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

GPT-5 (high) leads in math with an average score of 94 vs 49.

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

GPT-5 (high) leads in reasoning with an average score of 88 vs 47.

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