GPT-OSS 120B 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 42 (27 point difference).Grok 4 wins 4 out of 4 categories.

Knowledge

Grok 4

GPT-OSS 120B

48.8

Grok 4

84.8

51
MMLU
87
50
GPQA
86
48
SuperGPQA
84
46
OpenBookQA
82

Coding

Grok 4

GPT-OSS 120B

43

Grok 4

79

43
HumanEval
79

Mathematics

Grok 4

GPT-OSS 120B

50

Grok 4

86.6

51
AIME 2023
87
53
AIME 2024
89
52
AIME 2025
88
47
HMMT Feb 2023
84
49
HMMT Feb 2024
86
48
HMMT Feb 2025
85
50
BRUMO 2025
87

Reasoning

Grok 4

GPT-OSS 120B

48

Grok 4

82

49
SimpleQA
83
47
MuSR
81

Frequently Asked Questions

Which is better, GPT-OSS 120B or Grok 4?

Grok 4 scores higher overall with 69 vs 42, a difference of 27 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 120B or Grok 4?

Grok 4 leads in knowledge tasks with an average score of 84.8 vs 48.8.

Which is better for coding, GPT-OSS 120B or Grok 4?

Grok 4 leads in coding with an average score of 79 vs 43.

Which is better for math, GPT-OSS 120B or Grok 4?

Grok 4 leads in math with an average score of 86.6 vs 50.

Which is better for reasoning, GPT-OSS 120B or Grok 4?

Grok 4 leads in reasoning with an average score of 82 vs 48.