DeepSeek LLM 2.0 vs GPT-OSS 20B

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

Quick Verdict

DeepSeek LLM 2.0 wins overall with a score of 63 vs 22 (41 point difference).DeepSeek LLM 2.0 wins 4 out of 4 categories.

Knowledge

DeepSeek LLM 2.0

DeepSeek LLM 2.0

76.8

GPT-OSS 20B

28.8

79
MMLU
31
78
GPQA
30
76
SuperGPQA
28
74
OpenBookQA
26

Coding

DeepSeek LLM 2.0

DeepSeek LLM 2.0

73

GPT-OSS 20B

23

73
HumanEval
23

Mathematics

DeepSeek LLM 2.0

DeepSeek LLM 2.0

79

GPT-OSS 20B

30

80
AIME 2023
31
82
AIME 2024
33
81
AIME 2025
32
76
HMMT Feb 2023
27
78
HMMT Feb 2024
29
77
HMMT Feb 2025
28
79
BRUMO 2025
30

Reasoning

DeepSeek LLM 2.0

DeepSeek LLM 2.0

76

GPT-OSS 20B

28

77
SimpleQA
29
75
MuSR
27

Frequently Asked Questions

Which is better, DeepSeek LLM 2.0 or GPT-OSS 20B?

DeepSeek LLM 2.0 scores higher overall with 63 vs 22, a difference of 41 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek LLM 2.0 or GPT-OSS 20B?

DeepSeek LLM 2.0 leads in knowledge tasks with an average score of 76.8 vs 28.8.

Which is better for coding, DeepSeek LLM 2.0 or GPT-OSS 20B?

DeepSeek LLM 2.0 leads in coding with an average score of 73 vs 23.

Which is better for math, DeepSeek LLM 2.0 or GPT-OSS 20B?

DeepSeek LLM 2.0 leads in math with an average score of 79 vs 30.

Which is better for reasoning, DeepSeek LLM 2.0 or GPT-OSS 20B?

DeepSeek LLM 2.0 leads in reasoning with an average score of 76 vs 28.