Claude 4 Sonnet vs GPT-5.1

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

Quick Verdict

GPT-5.1 wins overall with a score of 76 vs 59 (17 point difference).GPT-5.1 wins 4 out of 4 categories.

Knowledge

GPT-5.1

Claude 4 Sonnet

71.5

GPT-5.1

94

73
MMLU
97
73
GPQA
95
71
SuperGPQA
93
69
OpenBookQA
91

Coding

GPT-5.1

Claude 4 Sonnet

65

GPT-5.1

89

65
HumanEval
89

Mathematics

GPT-5.1

Claude 4 Sonnet

72

GPT-5.1

97.1

73
AIME 2023
99
75
AIME 2024
99
74
AIME 2025
98
69
HMMT Feb 2023
95
71
HMMT Feb 2024
97
70
HMMT Feb 2025
96
72
BRUMO 2025
96

Reasoning

GPT-5.1

Claude 4 Sonnet

70

GPT-5.1

92

71
SimpleQA
93
69
MuSR
91

Frequently Asked Questions

Which is better, Claude 4 Sonnet or GPT-5.1?

GPT-5.1 scores higher overall with 76 vs 59, a difference of 17 points across all benchmarks.

Which is better for knowledge tasks, Claude 4 Sonnet or GPT-5.1?

GPT-5.1 leads in knowledge tasks with an average score of 94 vs 71.5.

Which is better for coding, Claude 4 Sonnet or GPT-5.1?

GPT-5.1 leads in coding with an average score of 89 vs 65.

Which is better for math, Claude 4 Sonnet or GPT-5.1?

GPT-5.1 leads in math with an average score of 97.1 vs 72.

Which is better for reasoning, Claude 4 Sonnet or GPT-5.1?

GPT-5.1 leads in reasoning with an average score of 92 vs 70.