DeepSeek Coder 2.0 vs GPT-OSS 120B

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

Quick Verdict

DeepSeek Coder 2.0 wins overall with a score of 64 vs 42 (22 point difference).DeepSeek Coder 2.0 wins 4 out of 4 categories.

Knowledge

DeepSeek Coder 2.0

DeepSeek Coder 2.0

77.8

GPT-OSS 120B

48.8

80
MMLU
51
79
GPQA
50
77
SuperGPQA
48
75
OpenBookQA
46

Coding

DeepSeek Coder 2.0

DeepSeek Coder 2.0

82

GPT-OSS 120B

43

82
HumanEval
43

Mathematics

DeepSeek Coder 2.0

DeepSeek Coder 2.0

80

GPT-OSS 120B

50

81
AIME 2023
51
83
AIME 2024
53
82
AIME 2025
52
77
HMMT Feb 2023
47
79
HMMT Feb 2024
49
78
HMMT Feb 2025
48
80
BRUMO 2025
50

Reasoning

DeepSeek Coder 2.0

DeepSeek Coder 2.0

77

GPT-OSS 120B

48

78
SimpleQA
49
76
MuSR
47

Frequently Asked Questions

Which is better, DeepSeek Coder 2.0 or GPT-OSS 120B?

DeepSeek Coder 2.0 scores higher overall with 64 vs 42, a difference of 22 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek Coder 2.0 or GPT-OSS 120B?

DeepSeek Coder 2.0 leads in knowledge tasks with an average score of 77.8 vs 48.8.

Which is better for coding, DeepSeek Coder 2.0 or GPT-OSS 120B?

DeepSeek Coder 2.0 leads in coding with an average score of 82 vs 43.

Which is better for math, DeepSeek Coder 2.0 or GPT-OSS 120B?

DeepSeek Coder 2.0 leads in math with an average score of 80 vs 50.

Which is better for reasoning, DeepSeek Coder 2.0 or GPT-OSS 120B?

DeepSeek Coder 2.0 leads in reasoning with an average score of 77 vs 48.