benchlm.ai

Claude Haiku 4.5 vs o4-mini (high)

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

Quick Verdict

o4-mini (high) wins overall with a score of 65 vs 57 (8 point difference).o4-mini (high) wins 4 out of 4 categories.

Claude Haiku 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score57

o4-mini (high)

CreatorOpenAI
TypeProprietary
Context200K
Score65

Knowledge

o4-mini (high)

Claude Haiku 4.5

65.8

o4-mini (high)

80.5

68
MMLU
82
67
GPQA
82
65
SuperGPQA
80
63
OpenBookQA
78

Coding

o4-mini (high)

Claude Haiku 4.5

60

o4-mini (high)

74

60
HumanEval
74

Mathematics

o4-mini (high)

Claude Haiku 4.5

67

o4-mini (high)

82

68
AIME 2023
83
70
AIME 2024
85
69
AIME 2025
84
64
HMMT Feb 2023
79
66
HMMT Feb 2024
81
65
HMMT Feb 2025
80
67
BRUMO 2025
82

Reasoning

o4-mini (high)

Claude Haiku 4.5

64

o4-mini (high)

79

65
SimpleQA
80
63
MuSR
78

Frequently Asked Questions

Which is better, Claude Haiku 4.5 or o4-mini (high)?

o4-mini (high) scores higher overall with 65 vs 57, a difference of 8 points across all benchmarks.

Which is better for knowledge tasks, Claude Haiku 4.5 or o4-mini (high)?

o4-mini (high) leads in knowledge tasks with an average score of 80.5 vs 65.8.

Which is better for coding, Claude Haiku 4.5 or o4-mini (high)?

o4-mini (high) leads in coding with an average score of 74 vs 60.

Which is better for math, Claude Haiku 4.5 or o4-mini (high)?

o4-mini (high) leads in math with an average score of 82 vs 67.

Which is better for reasoning, Claude Haiku 4.5 or o4-mini (high)?

o4-mini (high) leads in reasoning with an average score of 79 vs 64.

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