GPT-OSS 20B vs Mistral 8x7B

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

Quick Verdict

Mistral 8x7B wins overall with a score of 52 vs 22 (30 point difference).Mistral 8x7B wins 4 out of 4 categories.

Knowledge

Mistral 8x7B

GPT-OSS 20B

28.8

Mistral 8x7B

62.8

31
MMLU
65
30
GPQA
64
28
SuperGPQA
62
26
OpenBookQA
60

Coding

Mistral 8x7B

GPT-OSS 20B

23

Mistral 8x7B

55

23
HumanEval
55

Mathematics

Mistral 8x7B

GPT-OSS 20B

30

Mistral 8x7B

64

31
AIME 2023
65
33
AIME 2024
67
32
AIME 2025
66
27
HMMT Feb 2023
61
29
HMMT Feb 2024
63
28
HMMT Feb 2025
62
30
BRUMO 2025
64

Reasoning

Mistral 8x7B

GPT-OSS 20B

28

Mistral 8x7B

62

29
SimpleQA
63
27
MuSR
61

Frequently Asked Questions

Which is better, GPT-OSS 20B or Mistral 8x7B?

Mistral 8x7B scores higher overall with 52 vs 22, a difference of 30 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or Mistral 8x7B?

Mistral 8x7B leads in knowledge tasks with an average score of 62.8 vs 28.8.

Which is better for coding, GPT-OSS 20B or Mistral 8x7B?

Mistral 8x7B leads in coding with an average score of 55 vs 23.

Which is better for math, GPT-OSS 20B or Mistral 8x7B?

Mistral 8x7B leads in math with an average score of 64 vs 30.

Which is better for reasoning, GPT-OSS 20B or Mistral 8x7B?

Mistral 8x7B leads in reasoning with an average score of 62 vs 28.