benchlm.ai

Claude Sonnet 4.5 vs o4-mini (high)

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 65 (9 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

o4-mini (high)

CreatorOpenAI
TypeProprietary
Context200K
Score65

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

o4-mini (high)

80.5

95
MMLU
82
93
GPQA
82
91
SuperGPQA
80
89
OpenBookQA
78

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

o4-mini (high)

74

87
HumanEval
74

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

o4-mini (high)

82

97
AIME 2023
83
99
AIME 2024
85
98
AIME 2025
84
93
HMMT Feb 2023
79
95
HMMT Feb 2024
81
94
HMMT Feb 2025
80
96
BRUMO 2025
82

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

o4-mini (high)

79

91
SimpleQA
80
89
MuSR
78

Frequently Asked Questions

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

Claude Sonnet 4.5 scores higher overall with 74 vs 65, a difference of 9 points across all benchmarks.

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

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 80.5.

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

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 74.

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

Claude Sonnet 4.5 leads in math with an average score of 96 vs 82.

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

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 79.

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