GPT-5.1 vs Grok Code Fast 1

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

Quick Verdict

GPT-5.1 wins overall with a score of 76 vs 54 (22 point difference).GPT-5.1 wins 4 out of 4 categories.

Knowledge

GPT-5.1

GPT-5.1

94

Grok Code Fast 1

61.8

97
MMLU
64
95
GPQA
63
93
SuperGPQA
61
91
OpenBookQA
59

Coding

GPT-5.1

GPT-5.1

89

Grok Code Fast 1

60

89
HumanEval
60

Mathematics

GPT-5.1

GPT-5.1

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

GPT-5.1

GPT-5.1

92

Grok Code Fast 1

60

93
SimpleQA
61
91
MuSR
59

Frequently Asked Questions

Which is better, GPT-5.1 or Grok Code Fast 1?

GPT-5.1 scores higher overall with 76 vs 54, a difference of 22 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1 or Grok Code Fast 1?

GPT-5.1 leads in knowledge tasks with an average score of 94 vs 61.8.

Which is better for coding, GPT-5.1 or Grok Code Fast 1?

GPT-5.1 leads in coding with an average score of 89 vs 60.

Which is better for math, GPT-5.1 or Grok Code Fast 1?

GPT-5.1 leads in math with an average score of 97.1 vs 63.

Which is better for reasoning, GPT-5.1 or Grok Code Fast 1?

GPT-5.1 leads in reasoning with an average score of 92 vs 60.