benchlm.ai

Gemini 1.5 Pro vs Gemini 2.5 Flash

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

Quick Verdict

Gemini 1.5 Pro wins overall with a score of 54 vs 41 (13 point difference).Gemini 1.5 Pro wins 4 out of 4 categories.

Gemini 1.5 Pro

CreatorGoogle
TypeProprietary
Context2M
Score54

Gemini 2.5 Flash

CreatorGoogle
TypeProprietary
Context1M
Score41

Knowledge

Gemini 1.5 Pro

Gemini 1.5 Pro

62.5

Gemini 2.5 Flash

47.8

64
MMLU
50
64
GPQA
49
62
SuperGPQA
47
60
OpenBookQA
45

Coding

Gemini 1.5 Pro

Gemini 1.5 Pro

56

Gemini 2.5 Flash

42

56
HumanEval
42

Mathematics

Gemini 1.5 Pro

Gemini 1.5 Pro

63

Gemini 2.5 Flash

49

64
AIME 2023
50
66
AIME 2024
52
65
AIME 2025
51
60
HMMT Feb 2023
46
62
HMMT Feb 2024
48
61
HMMT Feb 2025
47
63
BRUMO 2025
49

Reasoning

Gemini 1.5 Pro

Gemini 1.5 Pro

61

Gemini 2.5 Flash

47

62
SimpleQA
48
60
MuSR
46

Frequently Asked Questions

Which is better, Gemini 1.5 Pro or Gemini 2.5 Flash?

Gemini 1.5 Pro scores higher overall with 54 vs 41, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, Gemini 1.5 Pro or Gemini 2.5 Flash?

Gemini 1.5 Pro leads in knowledge tasks with an average score of 62.5 vs 47.8.

Which is better for coding, Gemini 1.5 Pro or Gemini 2.5 Flash?

Gemini 1.5 Pro leads in coding with an average score of 56 vs 42.

Which is better for math, Gemini 1.5 Pro or Gemini 2.5 Flash?

Gemini 1.5 Pro leads in math with an average score of 63 vs 49.

Which is better for reasoning, Gemini 1.5 Pro or Gemini 2.5 Flash?

Gemini 1.5 Pro leads in reasoning with an average score of 61 vs 47.

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