benchlm.ai

Claude Sonnet 4.5 vs Grok 3 [Beta]

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 33 (41 point difference).Claude Sonnet 4.5 wins 4 out of 4 categories.

Claude Sonnet 4.5

CreatorAnthropic
TypeProprietary
Context1M
Score74

Grok 3 [Beta]

CreatorxAI
TypeProprietary
Context128K
Score33

Knowledge

Claude Sonnet 4.5

Claude Sonnet 4.5

92

Grok 3 [Beta]

39.8

95
MMLU
42
93
GPQA
41
91
SuperGPQA
39
89
OpenBookQA
37

Coding

Claude Sonnet 4.5

Claude Sonnet 4.5

87

Grok 3 [Beta]

34

87
HumanEval
34

Mathematics

Claude Sonnet 4.5

Claude Sonnet 4.5

96

Grok 3 [Beta]

41

97
AIME 2023
42
99
AIME 2024
44
98
AIME 2025
43
93
HMMT Feb 2023
38
95
HMMT Feb 2024
40
94
HMMT Feb 2025
39
96
BRUMO 2025
41

Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5

90

Grok 3 [Beta]

39

91
SimpleQA
40
89
MuSR
38

Frequently Asked Questions

Which is better, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 scores higher overall with 74 vs 33, a difference of 41 points across all benchmarks.

Which is better for knowledge tasks, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 leads in knowledge tasks with an average score of 92 vs 39.8.

Which is better for coding, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 leads in coding with an average score of 87 vs 34.

Which is better for math, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 leads in math with an average score of 96 vs 41.

Which is better for reasoning, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 leads in reasoning with an average score of 90 vs 39.

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