benchlm.ai

Claude Sonnet 4.5 vs DeepSeek V3.1

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 24 (50 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

DeepSeek V3.1

CreatorDeepSeek
TypeOpen Weight
Context128K
Score24

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

DeepSeek V3.1

30.8

95
MMLU
33
93
GPQA
32
91
SuperGPQA
30
89
OpenBookQA
28

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

DeepSeek V3.1

25

87
HumanEval
25

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

DeepSeek V3.1

32

97
AIME 2023
33
99
AIME 2024
35
98
AIME 2025
34
93
HMMT Feb 2023
29
95
HMMT Feb 2024
31
94
HMMT Feb 2025
30
96
BRUMO 2025
32

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

DeepSeek V3.1

30

91
SimpleQA
31
89
MuSR
29

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or DeepSeek V3.1?

Claude Sonnet 4.5 scores higher overall with 74 vs 24, a difference of 50 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or DeepSeek V3.1?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 30.8.

Which is better for coding, Claude Sonnet 4.5 or DeepSeek V3.1?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 25.

Which is better for math, Claude Sonnet 4.5 or DeepSeek V3.1?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 32.

Which is better for reasoning, Claude Sonnet 4.5 or DeepSeek V3.1?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 30.

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