benchlm.ai

Claude Opus 4.5 vs Grok Code Fast 1

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 54 (25 point difference).Claude Opus 4.5 wins 4 out of 4 categories.

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

Grok Code Fast 1

CreatorxAI
TypeProprietary
Context256K
Score54

Knowledge

Claude Opus 4.5

Claude Opus 4.5

96

Grok Code Fast 1

61.8

99
MMLU
64
97
GPQA
63
95
SuperGPQA
61
93
OpenBookQA
59

Coding

Claude Opus 4.5

Claude Opus 4.5

91

Grok Code Fast 1

60

91
HumanEval
60

Mathematics

Claude Opus 4.5

Claude Opus 4.5

97.1

Grok Code Fast 1

63

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

Reasoning

Claude Opus 4.5

Claude Opus 4.5

94

Grok Code Fast 1

60

95
SimpleQA
61
93
MuSR
59

Frequently Asked Questions

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

Claude Opus 4.5 scores higher overall with 79 vs 54, a difference of 25 points across all benchmarks.

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

Claude Opus 4.5 leads in knowledge tasks with an average score of 96 vs 61.8.

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

Claude Opus 4.5 leads in coding with an average score of 91 vs 60.

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

Claude Opus 4.5 leads in math with an average score of 97.1 vs 63.

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

Claude Opus 4.5 leads in reasoning with an average score of 94 vs 60.

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