benchlm.ai

Claude Opus 4.5 vs Grok 4.1 Fast

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

Quick Verdict

Claude Opus 4.5 wins overall with a score of 79 vs 73 (6 point difference).Claude Opus 4.5 wins 4 out of 4 categories.

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Knowledge

Claude Opus 4.5

Claude Opus 4.5

96

Grok 4.1 Fast

91

99
MMLU
94
97
GPQA
92
95
SuperGPQA
90
93
OpenBookQA
88

Coding

Claude Opus 4.5

Claude Opus 4.5

91

Grok 4.1 Fast

86

91
HumanEval
86

Mathematics

Claude Opus 4.5

Claude Opus 4.5

97.1

Grok 4.1 Fast

95

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

Reasoning

Claude Opus 4.5

Claude Opus 4.5

94

Grok 4.1 Fast

89

95
SimpleQA
90
93
MuSR
88

Frequently Asked Questions

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

Claude Opus 4.5 scores higher overall with 79 vs 73, a difference of 6 points across all benchmarks.

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

Claude Opus 4.5 leads in knowledge tasks with an average score of 96 vs 91.

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

Claude Opus 4.5 leads in coding with an average score of 91 vs 86.

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

Claude Opus 4.5 leads in math with an average score of 97.1 vs 95.

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

Claude Opus 4.5 leads in reasoning with an average score of 94 vs 89.

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