Gemini 2.5 Flash vs GPT-4o

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

Quick Verdict

GPT-4o wins overall with a score of 56 vs 41 (15 point difference).GPT-4o wins 4 out of 4 categories.

Knowledge

GPT-4o

Gemini 2.5 Flash

47.8

GPT-4o

64.5

50
MMLU
66
49
GPQA
66
47
SuperGPQA
64
45
OpenBookQA
62

Coding

GPT-4o

Gemini 2.5 Flash

42

GPT-4o

58

42
HumanEval
58

Mathematics

GPT-4o

Gemini 2.5 Flash

49

GPT-4o

65

50
AIME 2023
66
52
AIME 2024
68
51
AIME 2025
67
46
HMMT Feb 2023
62
48
HMMT Feb 2024
64
47
HMMT Feb 2025
63
49
BRUMO 2025
65

Reasoning

GPT-4o

Gemini 2.5 Flash

47

GPT-4o

63

48
SimpleQA
64
46
MuSR
62

Frequently Asked Questions

Which is better, Gemini 2.5 Flash or GPT-4o?

GPT-4o scores higher overall with 56 vs 41, a difference of 15 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Flash or GPT-4o?

GPT-4o leads in knowledge tasks with an average score of 64.5 vs 47.8.

Which is better for coding, Gemini 2.5 Flash or GPT-4o?

GPT-4o leads in coding with an average score of 58 vs 42.

Which is better for math, Gemini 2.5 Flash or GPT-4o?

GPT-4o leads in math with an average score of 65 vs 49.

Which is better for reasoning, Gemini 2.5 Flash or GPT-4o?

GPT-4o leads in reasoning with an average score of 63 vs 47.