Claude 4.1 Opus vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 61 (6 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Claude 4.1 Opus

74.5

o3

85.3

76
MMLU
86
76
GPQA
87
74
SuperGPQA
85
72
OpenBookQA
83

Coding

o3

Claude 4.1 Opus

68

o3

78

68
HumanEval
78

Mathematics

o3

Claude 4.1 Opus

75

o3

87

76
AIME 2023
88
78
AIME 2024
90
77
AIME 2025
89
72
HMMT Feb 2023
84
74
HMMT Feb 2024
86
73
HMMT Feb 2025
85
75
BRUMO 2025
87

Reasoning

o3

Claude 4.1 Opus

73

o3

83

74
SimpleQA
84
72
MuSR
82

Frequently Asked Questions

Which is better, Claude 4.1 Opus or o3?

o3 scores higher overall with 67 vs 61, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, Claude 4.1 Opus or o3?

o3 leads in knowledge tasks with an average score of 85.3 vs 74.5.

Which is better for coding, Claude 4.1 Opus or o3?

o3 leads in coding with an average score of 78 vs 68.

Which is better for math, Claude 4.1 Opus or o3?

o3 leads in math with an average score of 87 vs 75.

Which is better for reasoning, Claude 4.1 Opus or o3?

o3 leads in reasoning with an average score of 83 vs 73.