benchlm.ai

DeepSeek LLM 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 63 (14 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

DeepSeek LLM 2.0

CreatorDeepSeek
TypeOpen Weight
Context128K
Score63

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

DeepSeek LLM 2.0

76.8

GPT-5.1-Codex-Max

95

79
MMLU
98
78
GPQA
96
76
SuperGPQA
94
74
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

DeepSeek LLM 2.0

73

GPT-5.1-Codex-Max

94

73
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

DeepSeek LLM 2.0

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

DeepSeek LLM 2.0

76

GPT-5.1-Codex-Max

93

77
SimpleQA
94
75
MuSR
92

Frequently Asked Questions

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

GPT-5.1-Codex-Max scores higher overall with 77 vs 63, a difference of 14 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek LLM 2.0 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 76.8.

Which is better for coding, DeepSeek LLM 2.0 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 73.

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

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

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