benchlm.ai

GPT-OSS 20B vs Mistral 8x7B v0.2

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

Quick Verdict

GPT-OSS 20B wins overall with a score of 22 vs 20 (2 point difference).GPT-OSS 20B wins 4 out of 4 categories.

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

Mistral 8x7B v0.2

CreatorMistral
TypeOpen Weight
Context32K
Score20

Knowledge

GPT-OSS 20B

GPT-OSS 20B

28.8

Mistral 8x7B v0.2

26.8

31
MMLU
29
30
GPQA
28
28
SuperGPQA
26
26
OpenBookQA
24

Coding

GPT-OSS 20B

GPT-OSS 20B

23

Mistral 8x7B v0.2

21

23
HumanEval
21

Mathematics

GPT-OSS 20B

GPT-OSS 20B

30

Mistral 8x7B v0.2

28

31
AIME 2023
29
33
AIME 2024
31
32
AIME 2025
30
27
HMMT Feb 2023
25
29
HMMT Feb 2024
27
28
HMMT Feb 2025
26
30
BRUMO 2025
28

Reasoning

GPT-OSS 20B

GPT-OSS 20B

28

Mistral 8x7B v0.2

26

29
SimpleQA
27
27
MuSR
25

Frequently Asked Questions

Which is better, GPT-OSS 20B or Mistral 8x7B v0.2?

GPT-OSS 20B scores higher overall with 22 vs 20, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, GPT-OSS 20B or Mistral 8x7B v0.2?

GPT-OSS 20B leads in knowledge tasks with an average score of 28.8 vs 26.8.

Which is better for coding, GPT-OSS 20B or Mistral 8x7B v0.2?

GPT-OSS 20B leads in coding with an average score of 23 vs 21.

Which is better for math, GPT-OSS 20B or Mistral 8x7B v0.2?

GPT-OSS 20B leads in math with an average score of 30 vs 28.

Which is better for reasoning, GPT-OSS 20B or Mistral 8x7B v0.2?

GPT-OSS 20B leads in reasoning with an average score of 28 vs 26.

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