benchlm.ai

Claude Sonnet 4.5 vs Grok Code Fast 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 54 (20 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Grok Code Fast 1

CreatorxAI
TypeProprietary
Context256K
Score54

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

Grok Code Fast 1

61.8

95
MMLU
64
93
GPQA
63
91
SuperGPQA
61
89
OpenBookQA
59

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

Grok Code Fast 1

60

87
HumanEval
60

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

Grok Code Fast 1

63

97
AIME 2023
64
99
AIME 2024
66
98
AIME 2025
65
93
HMMT Feb 2023
60
95
HMMT Feb 2024
62
94
HMMT Feb 2025
61
96
BRUMO 2025
63

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

Grok Code Fast 1

60

91
SimpleQA
61
89
MuSR
59

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or Grok Code Fast 1?

Claude Sonnet 4.5 scores higher overall with 74 vs 54, a difference of 20 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or Grok Code Fast 1?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 61.8.

Which is better for coding, Claude Sonnet 4.5 or Grok Code Fast 1?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 60.

Which is better for math, Claude Sonnet 4.5 or Grok Code Fast 1?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 63.

Which is better for reasoning, Claude Sonnet 4.5 or Grok Code Fast 1?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 60.

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