benchlm.ai

Claude Sonnet 4.5 vs GPT-5 (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 72 (2 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

GPT-5 (high)

CreatorOpenAI
TypeProprietary
Context128K
Score72

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

GPT-5 (high)

90

95
MMLU
93
93
GPQA
91
91
SuperGPQA
89
89
OpenBookQA
87

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

GPT-5 (high)

85

87
HumanEval
85

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

GPT-5 (high)

94

97
AIME 2023
95
99
AIME 2024
97
98
AIME 2025
96
93
HMMT Feb 2023
91
95
HMMT Feb 2024
93
94
HMMT Feb 2025
92
96
BRUMO 2025
94

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

GPT-5 (high)

88

91
SimpleQA
89
89
MuSR
87

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or GPT-5 (high)?

Claude Sonnet 4.5 scores higher overall with 74 vs 72, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or GPT-5 (high)?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 90.

Which is better for coding, Claude Sonnet 4.5 or GPT-5 (high)?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 85.

Which is better for math, Claude Sonnet 4.5 or GPT-5 (high)?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 94.

Which is better for reasoning, Claude Sonnet 4.5 or GPT-5 (high)?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 88.

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