benchlm.ai

DeepSeek V3.1 vs GPT-OSS 20B

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

Quick Verdict

DeepSeek V3.1 wins overall with a score of 24 vs 22 (2 point difference).DeepSeek V3.1 wins 4 out of 4 categories.

DeepSeek V3.1

CreatorDeepSeek
TypeOpen Weight
Context128K
Score24

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

Knowledge

DeepSeek V3.1

DeepSeek V3.1

30.8

GPT-OSS 20B

28.8

33
MMLU
31
32
GPQA
30
30
SuperGPQA
28
28
OpenBookQA
26

Coding

DeepSeek V3.1

DeepSeek V3.1

25

GPT-OSS 20B

23

25
HumanEval
23

Mathematics

DeepSeek V3.1

DeepSeek V3.1

32

GPT-OSS 20B

30

33
AIME 2023
31
35
AIME 2024
33
34
AIME 2025
32
29
HMMT Feb 2023
27
31
HMMT Feb 2024
29
30
HMMT Feb 2025
28
32
BRUMO 2025
30

Reasoning

DeepSeek V3.1

DeepSeek V3.1

30

GPT-OSS 20B

28

31
SimpleQA
29
29
MuSR
27

Frequently Asked Questions

Which is better, DeepSeek V3.1 or GPT-OSS 20B?

DeepSeek V3.1 scores higher overall with 24 vs 22, a difference of 2 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek V3.1 or GPT-OSS 20B?

DeepSeek V3.1 leads in knowledge tasks with an average score of 30.8 vs 28.8.

Which is better for coding, DeepSeek V3.1 or GPT-OSS 20B?

DeepSeek V3.1 leads in coding with an average score of 25 vs 23.

Which is better for math, DeepSeek V3.1 or GPT-OSS 20B?

DeepSeek V3.1 leads in math with an average score of 32 vs 30.

Which is better for reasoning, DeepSeek V3.1 or GPT-OSS 20B?

DeepSeek V3.1 leads in reasoning with an average score of 30 vs 28.

Related Comparisons

DeepSeek V3.1 vs GPT-5.4DeepSeek V3.1 vs Gemini 3.1 ProDeepSeek V3.1 vs Claude Opus 4.6DeepSeek V3.1 vs GPT-5.3 CodexDeepSeek V3.1 vs Grok 4.1DeepSeek V3.1 vs GPT-5.2