DeepSeekMath V2 vs GPT-OSS 120B

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

Quick Verdict

DeepSeekMath V2 wins overall with a score of 64 vs 42 (22 point difference).DeepSeekMath V2 wins 4 out of 4 categories.

Knowledge

DeepSeekMath V2

DeepSeekMath V2

77.8

GPT-OSS 120B

48.8

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

Coding

DeepSeekMath V2

DeepSeekMath V2

72

GPT-OSS 120B

43

72
HumanEval
43

Mathematics

DeepSeekMath V2

DeepSeekMath V2

79

GPT-OSS 120B

50

80
AIME 2023
51
82
AIME 2024
53
81
AIME 2025
52
76
HMMT Feb 2023
47
78
HMMT Feb 2024
49
77
HMMT Feb 2025
48
79
BRUMO 2025
50

Reasoning

DeepSeekMath V2

DeepSeekMath V2

76

GPT-OSS 120B

48

77
SimpleQA
49
75
MuSR
47

Frequently Asked Questions

Which is better, DeepSeekMath V2 or GPT-OSS 120B?

DeepSeekMath V2 scores higher overall with 64 vs 42, a difference of 22 points across all benchmarks.

Which is better for knowledge tasks, DeepSeekMath V2 or GPT-OSS 120B?

DeepSeekMath V2 leads in knowledge tasks with an average score of 77.8 vs 48.8.

Which is better for coding, DeepSeekMath V2 or GPT-OSS 120B?

DeepSeekMath V2 leads in coding with an average score of 72 vs 43.

Which is better for math, DeepSeekMath V2 or GPT-OSS 120B?

DeepSeekMath V2 leads in math with an average score of 79 vs 50.

Which is better for reasoning, DeepSeekMath V2 or GPT-OSS 120B?

DeepSeekMath V2 leads in reasoning with an average score of 76 vs 48.