benchlm.ai

Claude Sonnet 4.6 vs o3-pro

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

Quick Verdict

Claude Sonnet 4.6 wins overall with a score of 80 vs 68 (12 point difference).Claude Sonnet 4.6 wins 4 out of 4 categories.

Claude Sonnet 4.6

CreatorAnthropic
TypeProprietary
Context1M
Score80

o3-pro

CreatorOpenAI
TypeProprietary
Context200K
Score68

Knowledge

Claude Sonnet 4.6

Claude Sonnet 4.6

96

o3-pro

87.3

99
MMLU
88
97
GPQA
89
95
SuperGPQA
87
93
OpenBookQA
85

Coding

Claude Sonnet 4.6

Claude Sonnet 4.6

93

o3-pro

80

93
HumanEval
80

Mathematics

Claude Sonnet 4.6

Claude Sonnet 4.6

97.1

o3-pro

89

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

Reasoning

Claude Sonnet 4.6

Claude Sonnet 4.6

94

o3-pro

85

95
SimpleQA
86
93
MuSR
84

Frequently Asked Questions

Which is better, Claude Sonnet 4.6 or o3-pro?

Claude Sonnet 4.6 scores higher overall with 80 vs 68, a difference of 12 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.6 or o3-pro?

Claude Sonnet 4.6 leads in knowledge tasks with an average score of 96 vs 87.3.

Which is better for coding, Claude Sonnet 4.6 or o3-pro?

Claude Sonnet 4.6 leads in coding with an average score of 93 vs 80.

Which is better for math, Claude Sonnet 4.6 or o3-pro?

Claude Sonnet 4.6 leads in math with an average score of 97.1 vs 89.

Which is better for reasoning, Claude Sonnet 4.6 or o3-pro?

Claude Sonnet 4.6 leads in reasoning with an average score of 94 vs 85.

Related Comparisons

Claude Sonnet 4.6 vs GPT-5.4Claude Sonnet 4.6 vs Gemini 3.1 ProClaude Sonnet 4.6 vs Claude Opus 4.6Claude Sonnet 4.6 vs GPT-5.3 CodexClaude Sonnet 4.6 vs Grok 4.1Claude Sonnet 4.6 vs GPT-5.2