benchlm.ai

Claude Sonnet 4.5 vs Grok 4.1 Fast

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 73 (1 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

Grok 4.1 Fast

91

95
MMLU
94
93
GPQA
92
91
SuperGPQA
90
89
OpenBookQA
88

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

Grok 4.1 Fast

86

87
HumanEval
86

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

Grok 4.1 Fast

95

97
AIME 2023
96
99
AIME 2024
98
98
AIME 2025
97
93
HMMT Feb 2023
92
95
HMMT Feb 2024
94
94
HMMT Feb 2025
93
96
BRUMO 2025
95

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

Grok 4.1 Fast

89

91
SimpleQA
90
89
MuSR
88

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or Grok 4.1 Fast?

Claude Sonnet 4.5 scores higher overall with 74 vs 73, a difference of 1 points across all benchmarks.

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

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 91.

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

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 86.

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

Claude Sonnet 4.5 leads in math with an average score of 96 vs 95.

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

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 89.

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