benchlm.ai

Claude Sonnet 4.5 vs GPT-5 (medium)

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 70 (4 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

GPT-5 (medium)

88

95
MMLU
91
93
GPQA
89
91
SuperGPQA
87
89
OpenBookQA
85

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

GPT-5 (medium)

83

87
HumanEval
83

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

GPT-5 (medium)

92

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

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

GPT-5 (medium)

86

91
SimpleQA
87
89
MuSR
85

Frequently Asked Questions

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

Claude Sonnet 4.5 scores higher overall with 74 vs 70, a difference of 4 points across all benchmarks.

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

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 88.

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

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 83.

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

Claude Sonnet 4.5 leads in math with an average score of 96 vs 92.

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

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 86.

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