benchlm.ai

Claude 4.1 Opus vs Claude Sonnet 4.5

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

Quick Verdict

Claude Sonnet 4.5 wins overall with a score of 74 vs 61 (13 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude 4.1 Opus

CreatorAnthropic
TypeProprietary
Context200K
Score61

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Knowledge

Claude Sonnet 4.5

Claude 4.1 Opus

74.5

Claude Sonnet 4.5

92

76
MMLU
95
76
GPQA
93
74
SuperGPQA
91
72
OpenBookQA
89

Coding

Claude Sonnet 4.5

Claude 4.1 Opus

68

Claude Sonnet 4.5

87

68
HumanEval
87

Mathematics

Claude Sonnet 4.5

Claude 4.1 Opus

75

Claude Sonnet 4.5

96

76
AIME 2023
97
78
AIME 2024
99
77
AIME 2025
98
72
HMMT Feb 2023
93
74
HMMT Feb 2024
95
73
HMMT Feb 2025
94
75
BRUMO 2025
96

Reasoning

Claude Sonnet 4.5

Claude 4.1 Opus

73

Claude Sonnet 4.5

90

74
SimpleQA
91
72
MuSR
89

Frequently Asked Questions

Which is better, Claude 4.1 Opus or Claude Sonnet 4.5?

Claude Sonnet 4.5 scores higher overall with 74 vs 61, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, Claude 4.1 Opus or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 74.5.

Which is better for coding, Claude 4.1 Opus or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 68.

Which is better for math, Claude 4.1 Opus or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 75.

Which is better for reasoning, Claude 4.1 Opus or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 73.

Related Comparisons

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