benchlm.ai

GPT-OSS 120B vs Grok Code Fast 1

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

Quick Verdict

Grok Code Fast 1 wins overall with a score of 54 vs 42 (12 point difference).Grok Code Fast 1 wins 4 out of 4 categories.

GPT-OSS 120B

CreatorOpenAI
TypeOpen Weight
Context128K
Score42

Grok Code Fast 1

CreatorxAI
TypeProprietary
Context256K
Score54

Knowledge

Grok Code Fast 1

GPT-OSS 120B

48.8

Grok Code Fast 1

61.8

51
MMLU
64
50
GPQA
63
48
SuperGPQA
61
46
OpenBookQA
59

Coding

Grok Code Fast 1

GPT-OSS 120B

43

Grok Code Fast 1

60

43
HumanEval
60

Mathematics

Grok Code Fast 1

GPT-OSS 120B

50

Grok Code Fast 1

63

51
AIME 2023
64
53
AIME 2024
66
52
AIME 2025
65
47
HMMT Feb 2023
60
49
HMMT Feb 2024
62
48
HMMT Feb 2025
61
50
BRUMO 2025
63

Reasoning

Grok Code Fast 1

GPT-OSS 120B

48

Grok Code Fast 1

60

49
SimpleQA
61
47
MuSR
59

Frequently Asked Questions

Which is better, GPT-OSS 120B or Grok Code Fast 1?

Grok Code Fast 1 scores higher overall with 54 vs 42, a difference of 12 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 120B or Grok Code Fast 1?

Grok Code Fast 1 leads in knowledge tasks with an average score of 61.8 vs 48.8.

Which is better for coding, GPT-OSS 120B or Grok Code Fast 1?

Grok Code Fast 1 leads in coding with an average score of 60 vs 43.

Which is better for math, GPT-OSS 120B or Grok Code Fast 1?

Grok Code Fast 1 leads in math with an average score of 63 vs 50.

Which is better for reasoning, GPT-OSS 120B or Grok Code Fast 1?

Grok Code Fast 1 leads in reasoning with an average score of 60 vs 48.

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