benchlm.ai

Claude 3.5 Sonnet vs Grok 4.1 Fast

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

Quick Verdict

Grok 4.1 Fast wins overall with a score of 73 vs 55 (18 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Claude 3.5 Sonnet

CreatorAnthropic
TypeProprietary
Context200K
Score55

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Knowledge

Grok 4.1 Fast

Claude 3.5 Sonnet

63.5

Grok 4.1 Fast

91

65
MMLU
94
65
GPQA
92
63
SuperGPQA
90
61
OpenBookQA
88

Coding

Grok 4.1 Fast

Claude 3.5 Sonnet

57

Grok 4.1 Fast

86

57
HumanEval
86

Mathematics

Grok 4.1 Fast

Claude 3.5 Sonnet

64

Grok 4.1 Fast

95

65
AIME 2023
96
67
AIME 2024
98
66
AIME 2025
97
61
HMMT Feb 2023
92
63
HMMT Feb 2024
94
62
HMMT Feb 2025
93
64
BRUMO 2025
95

Reasoning

Grok 4.1 Fast

Claude 3.5 Sonnet

62

Grok 4.1 Fast

89

63
SimpleQA
90
61
MuSR
88

Frequently Asked Questions

Which is better, Claude 3.5 Sonnet or Grok 4.1 Fast?

Grok 4.1 Fast scores higher overall with 73 vs 55, a difference of 18 points across all benchmarks.

Which is better for knowledge tasks, Claude 3.5 Sonnet or Grok 4.1 Fast?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 63.5.

Which is better for coding, Claude 3.5 Sonnet or Grok 4.1 Fast?

Grok 4.1 Fast leads in coding with an average score of 86 vs 57.

Which is better for math, Claude 3.5 Sonnet or Grok 4.1 Fast?

Grok 4.1 Fast leads in math with an average score of 95 vs 64.

Which is better for reasoning, Claude 3.5 Sonnet or Grok 4.1 Fast?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 62.

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