benchlm.ai

Claude Haiku 4.5 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 57 (14 point difference).o1-preview wins 4 out of 4 categories.

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

o1-preview

CreatorOpenAI
TypeProprietary
Context200K
Score71

Knowledge

o1-preview

Claude Haiku 4.5

65.8

o1-preview

89

68
MMLU
92
67
GPQA
90
65
SuperGPQA
88
63
OpenBookQA
86

Coding

o1-preview

Claude Haiku 4.5

60

o1-preview

86

60
HumanEval
86

Mathematics

o1-preview

Claude Haiku 4.5

67

o1-preview

93

68
AIME 2023
94
70
AIME 2024
96
69
AIME 2025
95
64
HMMT Feb 2023
90
66
HMMT Feb 2024
92
65
HMMT Feb 2025
91
67
BRUMO 2025
93

Reasoning

o1-preview

Claude Haiku 4.5

64

o1-preview

87

65
SimpleQA
88
63
MuSR
86

Frequently Asked Questions

Which is better, Claude Haiku 4.5 or o1-preview?

o1-preview scores higher overall with 71 vs 57, a difference of 14 points across all benchmarks.

Which is better for knowledge tasks, Claude Haiku 4.5 or o1-preview?

o1-preview leads in knowledge tasks with an average score of 89 vs 65.8.

Which is better for coding, Claude Haiku 4.5 or o1-preview?

o1-preview leads in coding with an average score of 86 vs 60.

Which is better for math, Claude Haiku 4.5 or o1-preview?

o1-preview leads in math with an average score of 93 vs 67.

Which is better for reasoning, Claude Haiku 4.5 or o1-preview?

o1-preview leads in reasoning with an average score of 87 vs 64.

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