benchlm.ai

GPT-5 (medium) vs Grok Code Fast 1

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 54 (16 point difference).GPT-5 (medium) wins 4 out of 4 categories.

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Grok Code Fast 1

CreatorxAI
TypeProprietary
Context256K
Score54

Knowledge

GPT-5 (medium)

GPT-5 (medium)

88

Grok Code Fast 1

61.8

91
MMLU
64
89
GPQA
63
87
SuperGPQA
61
85
OpenBookQA
59

Coding

GPT-5 (medium)

GPT-5 (medium)

83

Grok Code Fast 1

60

83
HumanEval
60

Mathematics

GPT-5 (medium)

GPT-5 (medium)

92

Grok Code Fast 1

63

93
AIME 2023
64
95
AIME 2024
66
94
AIME 2025
65
89
HMMT Feb 2023
60
91
HMMT Feb 2024
62
90
HMMT Feb 2025
61
92
BRUMO 2025
63

Reasoning

GPT-5 (medium)

GPT-5 (medium)

86

Grok Code Fast 1

60

87
SimpleQA
61
85
MuSR
59

Frequently Asked Questions

Which is better, GPT-5 (medium) or Grok Code Fast 1?

GPT-5 (medium) scores higher overall with 70 vs 54, a difference of 16 points across all benchmarks.

Which is better for knowledge tasks, GPT-5 (medium) or Grok Code Fast 1?

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 61.8.

Which is better for coding, GPT-5 (medium) or Grok Code Fast 1?

GPT-5 (medium) leads in coding with an average score of 83 vs 60.

Which is better for math, GPT-5 (medium) or Grok Code Fast 1?

GPT-5 (medium) leads in math with an average score of 92 vs 63.

Which is better for reasoning, GPT-5 (medium) or Grok Code Fast 1?

GPT-5 (medium) leads in reasoning with an average score of 86 vs 60.

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