benchlm.ai

Claude Sonnet 4.5 vs Gemini 2.5 Flash

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

Quick Verdict

Claude Sonnet 4.5 wins overall with a score of 74 vs 41 (33 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Gemini 2.5 Flash

CreatorGoogle
TypeProprietary
Context1M
Score41

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

Gemini 2.5 Flash

47.8

95
MMLU
50
93
GPQA
49
91
SuperGPQA
47
89
OpenBookQA
45

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

Gemini 2.5 Flash

42

87
HumanEval
42

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

Gemini 2.5 Flash

49

97
AIME 2023
50
99
AIME 2024
52
98
AIME 2025
51
93
HMMT Feb 2023
46
95
HMMT Feb 2024
48
94
HMMT Feb 2025
47
96
BRUMO 2025
49

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

Gemini 2.5 Flash

47

91
SimpleQA
48
89
MuSR
46

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or Gemini 2.5 Flash?

Claude Sonnet 4.5 scores higher overall with 74 vs 41, a difference of 33 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or Gemini 2.5 Flash?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 47.8.

Which is better for coding, Claude Sonnet 4.5 or Gemini 2.5 Flash?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 42.

Which is better for math, Claude Sonnet 4.5 or Gemini 2.5 Flash?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 49.

Which is better for reasoning, Claude Sonnet 4.5 or Gemini 2.5 Flash?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 47.

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