benchlm.ai

Claude 3.5 Sonnet vs Claude 4.1 Opus Thinking

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

Quick Verdict

Claude 3.5 Sonnet wins overall with a score of 55 vs 29 (26 point difference).Claude 3.5 Sonnet wins 4 out of 4 categories.

Claude 3.5 Sonnet

CreatorAnthropic
TypeProprietary
Context200K
Score55

Claude 4.1 Opus Thinking

CreatorAnthropic
TypeProprietary
Context200K
Score29

Knowledge

Claude 3.5 Sonnet

Claude 3.5 Sonnet

63.5

Claude 4.1 Opus Thinking

35.8

65
MMLU
38
65
GPQA
37
63
SuperGPQA
35
61
OpenBookQA
33

Coding

Claude 3.5 Sonnet

Claude 3.5 Sonnet

57

Claude 4.1 Opus Thinking

30

57
HumanEval
30

Mathematics

Claude 3.5 Sonnet

Claude 3.5 Sonnet

64

Claude 4.1 Opus Thinking

37

65
AIME 2023
38
67
AIME 2024
40
66
AIME 2025
39
61
HMMT Feb 2023
34
63
HMMT Feb 2024
36
62
HMMT Feb 2025
35
64
BRUMO 2025
37

Reasoning

Claude 3.5 Sonnet

Claude 3.5 Sonnet

62

Claude 4.1 Opus Thinking

35

63
SimpleQA
36
61
MuSR
34

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or Claude 4.1 Opus Thinking?

Claude 3.5 Sonnet scores higher overall with 55 vs 29, a difference of 26 points across all benchmarks.

Which is better for knowledge tasks, Claude 3.5 Sonnet or Claude 4.1 Opus Thinking?

Claude 3.5 Sonnet leads in knowledge tasks with an average score of 63.5 vs 35.8.

Which is better for coding, Claude 3.5 Sonnet or Claude 4.1 Opus Thinking?

Claude 3.5 Sonnet leads in coding with an average score of 57 vs 30.

Which is better for math, Claude 3.5 Sonnet or Claude 4.1 Opus Thinking?

Claude 3.5 Sonnet leads in math with an average score of 64 vs 37.

Which is better for reasoning, Claude 3.5 Sonnet or Claude 4.1 Opus Thinking?

Claude 3.5 Sonnet leads in reasoning with an average score of 62 vs 35.

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Claude 3.5 Sonnet vs GPT-5.4Claude 3.5 Sonnet vs Gemini 3.1 ProClaude 3.5 Sonnet vs Claude Opus 4.6Claude 3.5 Sonnet vs GPT-5.3 CodexClaude 3.5 Sonnet vs Grok 4.1Claude 3.5 Sonnet vs GPT-5.2