benchlm.ai

Claude 3.5 Sonnet vs Claude 4 Sonnet

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

Quick Verdict

Claude 4 Sonnet wins overall with a score of 59 vs 55 (4 point difference).Claude 4 Sonnet wins 4 out of 4 categories.

Claude 3.5 Sonnet

CreatorAnthropic
TypeProprietary
Context200K
Score55

Claude 4 Sonnet

CreatorAnthropic
TypeProprietary
Context200K
Score59

Knowledge

Claude 4 Sonnet

Claude 3.5 Sonnet

63.5

Claude 4 Sonnet

71.5

65
MMLU
73
65
GPQA
73
63
SuperGPQA
71
61
OpenBookQA
69

Coding

Claude 4 Sonnet

Claude 3.5 Sonnet

57

Claude 4 Sonnet

65

57
HumanEval
65

Mathematics

Claude 4 Sonnet

Claude 3.5 Sonnet

64

Claude 4 Sonnet

72

65
AIME 2023
73
67
AIME 2024
75
66
AIME 2025
74
61
HMMT Feb 2023
69
63
HMMT Feb 2024
71
62
HMMT Feb 2025
70
64
BRUMO 2025
72

Reasoning

Claude 4 Sonnet

Claude 3.5 Sonnet

62

Claude 4 Sonnet

70

63
SimpleQA
71
61
MuSR
69

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or Claude 4 Sonnet?

Claude 4 Sonnet scores higher overall with 59 vs 55, a difference of 4 points across all benchmarks.

Which is better for knowledge tasks, Claude 3.5 Sonnet or Claude 4 Sonnet?

Claude 4 Sonnet leads in knowledge tasks with an average score of 71.5 vs 63.5.

Which is better for coding, Claude 3.5 Sonnet or Claude 4 Sonnet?

Claude 4 Sonnet leads in coding with an average score of 65 vs 57.

Which is better for math, Claude 3.5 Sonnet or Claude 4 Sonnet?

Claude 4 Sonnet leads in math with an average score of 72 vs 64.

Which is better for reasoning, Claude 3.5 Sonnet or Claude 4 Sonnet?

Claude 4 Sonnet leads in reasoning with an average score of 70 vs 62.

Related Comparisons

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