Claude Sonnet 4.5 vs GPT-5.4

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

Quick Verdict

GPT-5.4 wins overall with a score of 88 vs 74 (14 point difference).GPT-5.4 wins 4 out of 4 categories.

Knowledge

GPT-5.4

Claude Sonnet 4.5

92

GPT-5.4

96

95
MMLU
99
93
GPQA
97
91
SuperGPQA
95
89
OpenBookQA
93

Coding

GPT-5.4

Claude Sonnet 4.5

87

GPT-5.4

91

87
HumanEval
91

Mathematics

GPT-5.4

Claude Sonnet 4.5

96

GPT-5.4

97.1

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

Reasoning

GPT-5.4

Claude Sonnet 4.5

90

GPT-5.4

94

91
SimpleQA
95
89
MuSR
93

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or GPT-5.4?

GPT-5.4 scores higher overall with 88 vs 74, a difference of 14 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or GPT-5.4?

GPT-5.4 leads in knowledge tasks with an average score of 96 vs 92.

Which is better for coding, Claude Sonnet 4.5 or GPT-5.4?

GPT-5.4 leads in coding with an average score of 91 vs 87.

Which is better for math, Claude Sonnet 4.5 or GPT-5.4?

GPT-5.4 leads in math with an average score of 97.1 vs 96.

Which is better for reasoning, Claude Sonnet 4.5 or GPT-5.4?

GPT-5.4 leads in reasoning with an average score of 94 vs 90.