benchlm.ai

Claude Sonnet 4.5 vs GPT-5 mini

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 68 (6 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

GPT-5 mini

85

95
MMLU
88
93
GPQA
86
91
SuperGPQA
84
89
OpenBookQA
82

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

GPT-5 mini

80

87
HumanEval
80

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

GPT-5 mini

89

97
AIME 2023
90
99
AIME 2024
92
98
AIME 2025
91
93
HMMT Feb 2023
86
95
HMMT Feb 2024
88
94
HMMT Feb 2025
87
96
BRUMO 2025
89

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

GPT-5 mini

83

91
SimpleQA
84
89
MuSR
82

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or GPT-5 mini?

Claude Sonnet 4.5 scores higher overall with 74 vs 68, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or GPT-5 mini?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 85.

Which is better for coding, Claude Sonnet 4.5 or GPT-5 mini?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 80.

Which is better for math, Claude Sonnet 4.5 or GPT-5 mini?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 89.

Which is better for reasoning, Claude Sonnet 4.5 or GPT-5 mini?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 83.

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