benchlm.ai

Claude Opus 4.6 vs o3

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

Quick Verdict

Claude Opus 4.6 wins overall with a score of 86 vs 67 (19 point difference).Claude Opus 4.6 wins 4 out of 4 categories.

Claude Opus 4.6

CreatorAnthropic
TypeProprietary
Context1M
Score86

o3

CreatorOpenAI
TypeProprietary
Context200K
Score67

Knowledge

Claude Opus 4.6

Claude Opus 4.6

96

o3

85.3

99
MMLU
86
97
GPQA
87
95
SuperGPQA
85
93
OpenBookQA
83

Coding

Claude Opus 4.6

Claude Opus 4.6

91

o3

78

91
HumanEval
78

Mathematics

Claude Opus 4.6

Claude Opus 4.6

97.1

o3

87

99
AIME 2023
88
99
AIME 2024
90
98
AIME 2025
89
95
HMMT Feb 2023
84
97
HMMT Feb 2024
86
96
HMMT Feb 2025
85
96
BRUMO 2025
87

Reasoning

Claude Opus 4.6

Claude Opus 4.6

94

o3

83

95
SimpleQA
84
93
MuSR
82

Frequently Asked Questions

Which is better, Claude Opus 4.6 or o3?

Claude Opus 4.6 scores higher overall with 86 vs 67, a difference of 19 points across all benchmarks.

Which is better for knowledge tasks, Claude Opus 4.6 or o3?

Claude Opus 4.6 leads in knowledge tasks with an average score of 96 vs 85.3.

Which is better for coding, Claude Opus 4.6 or o3?

Claude Opus 4.6 leads in coding with an average score of 91 vs 78.

Which is better for math, Claude Opus 4.6 or o3?

Claude Opus 4.6 leads in math with an average score of 97.1 vs 87.

Which is better for reasoning, Claude Opus 4.6 or o3?

Claude Opus 4.6 leads in reasoning with an average score of 94 vs 83.

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