benchlm.ai

DeepSeekMath V2 vs GPT-5.1-Codex-Max

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

Quick Verdict

GPT-5.1-Codex-Max wins overall with a score of 77 vs 64 (13 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

DeepSeekMath V2

CreatorDeepSeek
TypeOpen Weight
Context128K
Score64

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

DeepSeekMath V2

77.8

GPT-5.1-Codex-Max

95

80
MMLU
98
79
GPQA
96
77
SuperGPQA
94
75
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

DeepSeekMath V2

72

GPT-5.1-Codex-Max

94

72
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

DeepSeekMath V2

79

GPT-5.1-Codex-Max

97.1

80
AIME 2023
99
82
AIME 2024
99
81
AIME 2025
98
76
HMMT Feb 2023
95
78
HMMT Feb 2024
97
77
HMMT Feb 2025
96
79
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

DeepSeekMath V2

76

GPT-5.1-Codex-Max

93

77
SimpleQA
94
75
MuSR
92

Frequently Asked Questions

Which is better, DeepSeekMath V2 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 64, a difference of 13 points across all benchmarks.

Which is better for knowledge tasks, DeepSeekMath V2 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 77.8.

Which is better for coding, DeepSeekMath V2 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 72.

Which is better for math, DeepSeekMath V2 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 79.

Which is better for reasoning, DeepSeekMath V2 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 76.

Related Comparisons

DeepSeekMath V2 vs GPT-5.4DeepSeekMath V2 vs Gemini 3.1 ProDeepSeekMath V2 vs Claude Opus 4.6DeepSeekMath V2 vs GPT-5.3 CodexDeepSeekMath V2 vs Grok 4.1DeepSeekMath V2 vs GPT-5.2