Claude 4.1 Opus Thinking vs o3

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

Quick Verdict

o3 wins overall with a score of 67 vs 29 (38 point difference).o3 wins 4 out of 4 categories.

Knowledge

o3

Claude 4.1 Opus Thinking

35.8

o3

85.3

38
MMLU
86
37
GPQA
87
35
SuperGPQA
85
33
OpenBookQA
83

Coding

o3

Claude 4.1 Opus Thinking

30

o3

78

30
HumanEval
78

Mathematics

o3

Claude 4.1 Opus Thinking

37

o3

87

38
AIME 2023
88
40
AIME 2024
90
39
AIME 2025
89
34
HMMT Feb 2023
84
36
HMMT Feb 2024
86
35
HMMT Feb 2025
85
37
BRUMO 2025
87

Reasoning

o3

Claude 4.1 Opus Thinking

35

o3

83

36
SimpleQA
84
34
MuSR
82

Frequently Asked Questions

Which is better, Claude 4.1 Opus Thinking or o3?

o3 scores higher overall with 67 vs 29, a difference of 38 points across all benchmarks.

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

o3 leads in knowledge tasks with an average score of 85.3 vs 35.8.

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

o3 leads in coding with an average score of 78 vs 30.

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

o3 leads in math with an average score of 87 vs 37.

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

o3 leads in reasoning with an average score of 83 vs 35.