GPT-OSS 120B vs Mistral Large 3

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

Quick Verdict

Mistral Large 3 wins overall with a score of 61 vs 42 (19 point difference).Mistral Large 3 wins 4 out of 4 categories.

Knowledge

Mistral Large 3

GPT-OSS 120B

48.8

Mistral Large 3

73.8

51
MMLU
76
50
GPQA
75
48
SuperGPQA
73
46
OpenBookQA
71

Coding

Mistral Large 3

GPT-OSS 120B

43

Mistral Large 3

68

43
HumanEval
68

Mathematics

Mistral Large 3

GPT-OSS 120B

50

Mistral Large 3

75

51
AIME 2023
76
53
AIME 2024
78
52
AIME 2025
77
47
HMMT Feb 2023
72
49
HMMT Feb 2024
74
48
HMMT Feb 2025
73
50
BRUMO 2025
75

Reasoning

Mistral Large 3

GPT-OSS 120B

48

Mistral Large 3

72

49
SimpleQA
73
47
MuSR
71

Frequently Asked Questions

Which is better, GPT-OSS 120B or Mistral Large 3?

Mistral Large 3 scores higher overall with 61 vs 42, a difference of 19 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 120B or Mistral Large 3?

Mistral Large 3 leads in knowledge tasks with an average score of 73.8 vs 48.8.

Which is better for coding, GPT-OSS 120B or Mistral Large 3?

Mistral Large 3 leads in coding with an average score of 68 vs 43.

Which is better for math, GPT-OSS 120B or Mistral Large 3?

Mistral Large 3 leads in math with an average score of 75 vs 50.

Which is better for reasoning, GPT-OSS 120B or Mistral Large 3?

Mistral Large 3 leads in reasoning with an average score of 72 vs 48.