benchlm.ai

DeepSeek Coder 2.0 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.

DeepSeek Coder 2.0

CreatorDeepSeek
TypeOpen Weight
Context128K
Score64

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

DeepSeek Coder 2.0

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

DeepSeek Coder 2.0

82

GPT-5.1-Codex-Max

94

82
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

DeepSeek Coder 2.0

80

GPT-5.1-Codex-Max

97.1

81
AIME 2023
99
83
AIME 2024
99
82
AIME 2025
98
77
HMMT Feb 2023
95
79
HMMT Feb 2024
97
78
HMMT Feb 2025
96
80
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

DeepSeek Coder 2.0

77

GPT-5.1-Codex-Max

93

78
SimpleQA
94
76
MuSR
92

Frequently Asked Questions

Which is better, DeepSeek Coder 2.0 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, DeepSeek Coder 2.0 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, DeepSeek Coder 2.0 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 82.

Which is better for math, DeepSeek Coder 2.0 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 80.

Which is better for reasoning, DeepSeek Coder 2.0 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 77.

Related Comparisons

DeepSeek Coder 2.0 vs GPT-5.4DeepSeek Coder 2.0 vs Gemini 3.1 ProDeepSeek Coder 2.0 vs Claude Opus 4.6DeepSeek Coder 2.0 vs GPT-5.3 CodexDeepSeek Coder 2.0 vs Grok 4.1DeepSeek Coder 2.0 vs GPT-5.2