benchlm.ai

DeepSeek-R1 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 35 (42 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

DeepSeek-R1

CreatorDeepSeek
TypeOpen Weight
Context128K
Score35

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

DeepSeek-R1

41.8

GPT-5.1-Codex-Max

95

44
MMLU
98
43
GPQA
96
41
SuperGPQA
94
39
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

DeepSeek-R1

36

GPT-5.1-Codex-Max

94

36
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

DeepSeek-R1

43

GPT-5.1-Codex-Max

97.1

44
AIME 2023
99
46
AIME 2024
99
45
AIME 2025
98
40
HMMT Feb 2023
95
42
HMMT Feb 2024
97
41
HMMT Feb 2025
96
43
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

DeepSeek-R1

41

GPT-5.1-Codex-Max

93

42
SimpleQA
94
40
MuSR
92

Frequently Asked Questions

Which is better, DeepSeek-R1 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 35, a difference of 42 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek-R1 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 41.8.

Which is better for coding, DeepSeek-R1 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 36.

Which is better for math, DeepSeek-R1 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 43.

Which is better for reasoning, DeepSeek-R1 or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 41.

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