DeepSeek V3.2 (Thinking) vs GPT-5.2-Codex

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

Quick Verdict

GPT-5.2-Codex wins overall with a score of 82 vs 69 (13 point difference).GPT-5.2-Codex wins 4 out of 4 categories.

Knowledge

GPT-5.2-Codex

DeepSeek V3.2 (Thinking)

84

GPT-5.2-Codex

96

87
MMLU
99
85
GPQA
97
83
SuperGPQA
95
81
OpenBookQA
93

Coding

GPT-5.2-Codex

DeepSeek V3.2 (Thinking)

79

GPT-5.2-Codex

95

79
HumanEval
95

Mathematics

GPT-5.2-Codex

DeepSeek V3.2 (Thinking)

86

GPT-5.2-Codex

97.1

87
AIME 2023
99
89
AIME 2024
99
88
AIME 2025
98
83
HMMT Feb 2023
95
85
HMMT Feb 2024
97
84
HMMT Feb 2025
96
86
BRUMO 2025
96

Reasoning

GPT-5.2-Codex

DeepSeek V3.2 (Thinking)

82

GPT-5.2-Codex

94

83
SimpleQA
95
81
MuSR
93

Frequently Asked Questions

Which is better, DeepSeek V3.2 (Thinking) or GPT-5.2-Codex?

GPT-5.2-Codex scores higher overall with 82 vs 69, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek V3.2 (Thinking) or GPT-5.2-Codex?

GPT-5.2-Codex leads in knowledge tasks with an average score of 96 vs 84.

Which is better for coding, DeepSeek V3.2 (Thinking) or GPT-5.2-Codex?

GPT-5.2-Codex leads in coding with an average score of 95 vs 79.

Which is better for math, DeepSeek V3.2 (Thinking) or GPT-5.2-Codex?

GPT-5.2-Codex leads in math with an average score of 97.1 vs 86.

Which is better for reasoning, DeepSeek V3.2 (Thinking) or GPT-5.2-Codex?

GPT-5.2-Codex leads in reasoning with an average score of 94 vs 82.