DeepSeek V3.2 (Thinking) vs GPT-OSS 20B

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

Quick Verdict

DeepSeek V3.2 (Thinking) wins overall with a score of 69 vs 22 (47 point difference).DeepSeek V3.2 (Thinking) wins 4 out of 4 categories.

Knowledge

DeepSeek V3.2 (Thinking)

DeepSeek V3.2 (Thinking)

84

GPT-OSS 20B

28.8

87
MMLU
31
85
GPQA
30
83
SuperGPQA
28
81
OpenBookQA
26

Coding

DeepSeek V3.2 (Thinking)

DeepSeek V3.2 (Thinking)

79

GPT-OSS 20B

23

79
HumanEval
23

Mathematics

DeepSeek V3.2 (Thinking)

DeepSeek V3.2 (Thinking)

86

GPT-OSS 20B

30

87
AIME 2023
31
89
AIME 2024
33
88
AIME 2025
32
83
HMMT Feb 2023
27
85
HMMT Feb 2024
29
84
HMMT Feb 2025
28
86
BRUMO 2025
30

Reasoning

DeepSeek V3.2 (Thinking)

DeepSeek V3.2 (Thinking)

82

GPT-OSS 20B

28

83
SimpleQA
29
81
MuSR
27

Frequently Asked Questions

Which is better, DeepSeek V3.2 (Thinking) or GPT-OSS 20B?

DeepSeek V3.2 (Thinking) scores higher overall with 69 vs 22, a difference of 47 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek V3.2 (Thinking) or GPT-OSS 20B?

DeepSeek V3.2 (Thinking) leads in knowledge tasks with an average score of 84 vs 28.8.

Which is better for coding, DeepSeek V3.2 (Thinking) or GPT-OSS 20B?

DeepSeek V3.2 (Thinking) leads in coding with an average score of 79 vs 23.

Which is better for math, DeepSeek V3.2 (Thinking) or GPT-OSS 20B?

DeepSeek V3.2 (Thinking) leads in math with an average score of 86 vs 30.

Which is better for reasoning, DeepSeek V3.2 (Thinking) or GPT-OSS 20B?

DeepSeek V3.2 (Thinking) leads in reasoning with an average score of 82 vs 28.