benchlm.ai

GPT-OSS 20B vs Grok 4

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

Quick Verdict

Grok 4 wins overall with a score of 69 vs 22 (47 point difference).Grok 4 wins 4 out of 4 categories.

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

Grok 4

CreatorxAI
TypeProprietary
Context128K
Score69

Knowledge

Grok 4

GPT-OSS 20B

28.8

Grok 4

84.8

31
MMLU
87
30
GPQA
86
28
SuperGPQA
84
26
OpenBookQA
82

Coding

Grok 4

GPT-OSS 20B

23

Grok 4

79

23
HumanEval
79

Mathematics

Grok 4

GPT-OSS 20B

30

Grok 4

86.6

31
AIME 2023
87
33
AIME 2024
89
32
AIME 2025
88
27
HMMT Feb 2023
84
29
HMMT Feb 2024
86
28
HMMT Feb 2025
85
30
BRUMO 2025
87

Reasoning

Grok 4

GPT-OSS 20B

28

Grok 4

82

29
SimpleQA
83
27
MuSR
81

Frequently Asked Questions

Which is better, GPT-OSS 20B or Grok 4?

Grok 4 scores higher overall with 69 vs 22, a difference of 47 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or Grok 4?

Grok 4 leads in knowledge tasks with an average score of 84.8 vs 28.8.

Which is better for coding, GPT-OSS 20B or Grok 4?

Grok 4 leads in coding with an average score of 79 vs 23.

Which is better for math, GPT-OSS 20B or Grok 4?

Grok 4 leads in math with an average score of 86.6 vs 30.

Which is better for reasoning, GPT-OSS 20B or Grok 4?

Grok 4 leads in reasoning with an average score of 82 vs 28.

Related Comparisons

GPT-OSS 20B vs GPT-5.4GPT-OSS 20B vs Gemini 3.1 ProGPT-OSS 20B vs Claude Opus 4.6GPT-OSS 20B vs GPT-5.3 CodexGPT-OSS 20B vs Grok 4.1GPT-OSS 20B vs GPT-5.2