benchlm.ai

Claude 3 Opus vs Claude Opus 4.5

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

Quick Verdict

Claude Opus 4.5 wins overall with a score of 79 vs 51 (28 point difference).Claude Opus 4.5 wins 4 out of 4 categories.

Claude 3 Opus

CreatorAnthropic
TypeProprietary
Context200K
Score51

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

Knowledge

Claude Opus 4.5

Claude 3 Opus

59.5

Claude Opus 4.5

96

61
MMLU
99
61
GPQA
97
59
SuperGPQA
95
57
OpenBookQA
93

Coding

Claude Opus 4.5

Claude 3 Opus

53

Claude Opus 4.5

91

53
HumanEval
91

Mathematics

Claude Opus 4.5

Claude 3 Opus

60

Claude Opus 4.5

97.1

61
AIME 2023
99
63
AIME 2024
99
62
AIME 2025
98
57
HMMT Feb 2023
95
59
HMMT Feb 2024
97
58
HMMT Feb 2025
96
60
BRUMO 2025
96

Reasoning

Claude Opus 4.5

Claude 3 Opus

58

Claude Opus 4.5

94

59
SimpleQA
95
57
MuSR
93

Frequently Asked Questions

Which is better, Claude 3 Opus or Claude Opus 4.5?

Claude Opus 4.5 scores higher overall with 79 vs 51, a difference of 28 points across all benchmarks.

Which is better for knowledge tasks, Claude 3 Opus or Claude Opus 4.5?

Claude Opus 4.5 leads in knowledge tasks with an average score of 96 vs 59.5.

Which is better for coding, Claude 3 Opus or Claude Opus 4.5?

Claude Opus 4.5 leads in coding with an average score of 91 vs 53.

Which is better for math, Claude 3 Opus or Claude Opus 4.5?

Claude Opus 4.5 leads in math with an average score of 97.1 vs 60.

Which is better for reasoning, Claude 3 Opus or Claude Opus 4.5?

Claude Opus 4.5 leads in reasoning with an average score of 94 vs 58.

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