benchlm.ai

Claude 3 Haiku vs Claude Sonnet 4.5

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 46 (28 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude 3 Haiku

CreatorAnthropic
TypeProprietary
Context200K
Score46

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Knowledge

Claude Sonnet 4.5

Claude 3 Haiku

54.5

Claude Sonnet 4.5

92

56
MMLU
95
56
GPQA
93
54
SuperGPQA
91
52
OpenBookQA
89

Coding

Claude Sonnet 4.5

Claude 3 Haiku

48

Claude Sonnet 4.5

87

48
HumanEval
87

Mathematics

Claude Sonnet 4.5

Claude 3 Haiku

55

Claude Sonnet 4.5

96

56
AIME 2023
97
58
AIME 2024
99
57
AIME 2025
98
52
HMMT Feb 2023
93
54
HMMT Feb 2024
95
53
HMMT Feb 2025
94
55
BRUMO 2025
96

Reasoning

Claude Sonnet 4.5

Claude 3 Haiku

53

Claude Sonnet 4.5

90

54
SimpleQA
91
52
MuSR
89

Frequently Asked Questions

Which is better, Claude 3 Haiku or Claude Sonnet 4.5?

Claude Sonnet 4.5 scores higher overall with 74 vs 46, a difference of 28 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Haiku or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 54.5.

Which is better for coding, Claude 3 Haiku or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 48.

Which is better for math, Claude 3 Haiku or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 55.

Which is better for reasoning, Claude 3 Haiku or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 53.

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