benchlm.ai

GPT-5 (medium) vs Grok 4.1 Fast

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

Quick Verdict

Grok 4.1 Fast wins overall with a score of 73 vs 70 (3 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Grok 4.1 Fast

CreatorxAI
TypeProprietary
Context2M
Score73

Knowledge

Grok 4.1 Fast

GPT-5 (medium)

88

Grok 4.1 Fast

91

91
MMLU
94
89
GPQA
92
87
SuperGPQA
90
85
OpenBookQA
88

Coding

Grok 4.1 Fast

GPT-5 (medium)

83

Grok 4.1 Fast

86

83
HumanEval
86

Mathematics

Grok 4.1 Fast

GPT-5 (medium)

92

Grok 4.1 Fast

95

93
AIME 2023
96
95
AIME 2024
98
94
AIME 2025
97
89
HMMT Feb 2023
92
91
HMMT Feb 2024
94
90
HMMT Feb 2025
93
92
BRUMO 2025
95

Reasoning

Grok 4.1 Fast

GPT-5 (medium)

86

Grok 4.1 Fast

89

87
SimpleQA
90
85
MuSR
88

Frequently Asked Questions

Which is better, GPT-5 (medium) or Grok 4.1 Fast?

Grok 4.1 Fast scores higher overall with 73 vs 70, a difference of 3 points across all benchmarks.

Which is better for knowledge tasks, GPT-5 (medium) or Grok 4.1 Fast?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 88.

Which is better for coding, GPT-5 (medium) or Grok 4.1 Fast?

Grok 4.1 Fast leads in coding with an average score of 86 vs 83.

Which is better for math, GPT-5 (medium) or Grok 4.1 Fast?

Grok 4.1 Fast leads in math with an average score of 95 vs 92.

Which is better for reasoning, GPT-5 (medium) or Grok 4.1 Fast?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 86.

Related Comparisons

GPT-5 (medium) vs GPT-5.4GPT-5 (medium) vs Gemini 3.1 ProGPT-5 (medium) vs Claude Opus 4.6GPT-5 (medium) vs GPT-5.3 CodexGPT-5 (medium) vs Grok 4.1GPT-5 (medium) vs GPT-5.2