benchlm.ai

GPT-OSS 20B 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 22 (32 point difference).Grok Code Fast 1 wins 4 out of 4 categories.

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

Grok Code Fast 1

CreatorxAI
TypeProprietary
Context256K
Score54

Knowledge

Grok Code Fast 1

GPT-OSS 20B

28.8

Grok Code Fast 1

61.8

31
MMLU
64
30
GPQA
63
28
SuperGPQA
61
26
OpenBookQA
59

Coding

Grok Code Fast 1

GPT-OSS 20B

23

Grok Code Fast 1

60

23
HumanEval
60

Mathematics

Grok Code Fast 1

GPT-OSS 20B

30

Grok Code Fast 1

63

31
AIME 2023
64
33
AIME 2024
66
32
AIME 2025
65
27
HMMT Feb 2023
60
29
HMMT Feb 2024
62
28
HMMT Feb 2025
61
30
BRUMO 2025
63

Reasoning

Grok Code Fast 1

GPT-OSS 20B

28

Grok Code Fast 1

60

29
SimpleQA
61
27
MuSR
59

Frequently Asked Questions

Which is better, GPT-OSS 20B or Grok Code Fast 1?

Grok Code Fast 1 scores higher overall with 54 vs 22, a difference of 32 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or Grok Code Fast 1?

Grok Code Fast 1 leads in knowledge tasks with an average score of 61.8 vs 28.8.

Which is better for coding, GPT-OSS 20B or Grok Code Fast 1?

Grok Code Fast 1 leads in coding with an average score of 60 vs 23.

Which is better for math, GPT-OSS 20B or Grok Code Fast 1?

Grok Code Fast 1 leads in math with an average score of 63 vs 30.

Which is better for reasoning, GPT-OSS 20B or Grok Code Fast 1?

Grok Code Fast 1 leads in reasoning with an average score of 60 vs 28.

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