benchlm.ai

Gemini 2.5 Flash vs o1-preview

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

Quick Verdict

o1-preview wins overall with a score of 71 vs 41 (30 point difference).o1-preview wins 4 out of 4 categories.

Gemini 2.5 Flash

CreatorGoogle
TypeProprietary
Context1M
Score41

o1-preview

CreatorOpenAI
TypeProprietary
Context200K
Score71

Knowledge

o1-preview

Gemini 2.5 Flash

47.8

o1-preview

89

50
MMLU
92
49
GPQA
90
47
SuperGPQA
88
45
OpenBookQA
86

Coding

o1-preview

Gemini 2.5 Flash

42

o1-preview

86

42
HumanEval
86

Mathematics

o1-preview

Gemini 2.5 Flash

49

o1-preview

93

50
AIME 2023
94
52
AIME 2024
96
51
AIME 2025
95
46
HMMT Feb 2023
90
48
HMMT Feb 2024
92
47
HMMT Feb 2025
91
49
BRUMO 2025
93

Reasoning

o1-preview

Gemini 2.5 Flash

47

o1-preview

87

48
SimpleQA
88
46
MuSR
86

Frequently Asked Questions

Which is better, Gemini 2.5 Flash or o1-preview?

o1-preview scores higher overall with 71 vs 41, a difference of 30 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Flash or o1-preview?

o1-preview leads in knowledge tasks with an average score of 89 vs 47.8.

Which is better for coding, Gemini 2.5 Flash or o1-preview?

o1-preview leads in coding with an average score of 86 vs 42.

Which is better for math, Gemini 2.5 Flash or o1-preview?

o1-preview leads in math with an average score of 93 vs 49.

Which is better for reasoning, Gemini 2.5 Flash or o1-preview?

o1-preview leads in reasoning with an average score of 87 vs 47.

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