benchlm.ai

DeepSeek V3.1 (Reasoning) vs GPT-5 (medium)

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

Quick Verdict

GPT-5 (medium) wins overall with a score of 70 vs 25 (45 point difference).GPT-5 (medium) wins 4 out of 4 categories.

DeepSeek V3.1 (Reasoning)

CreatorDeepSeek
TypeOpen Weight
Context128K
Score25

GPT-5 (medium)

CreatorOpenAI
TypeProprietary
Context128K
Score70

Knowledge

GPT-5 (medium)

DeepSeek V3.1 (Reasoning)

31.8

GPT-5 (medium)

88

34
MMLU
91
33
GPQA
89
31
SuperGPQA
87
29
OpenBookQA
85

Coding

GPT-5 (medium)

DeepSeek V3.1 (Reasoning)

26

GPT-5 (medium)

83

26
HumanEval
83

Mathematics

GPT-5 (medium)

DeepSeek V3.1 (Reasoning)

33

GPT-5 (medium)

92

34
AIME 2023
93
36
AIME 2024
95
35
AIME 2025
94
30
HMMT Feb 2023
89
32
HMMT Feb 2024
91
31
HMMT Feb 2025
90
33
BRUMO 2025
92

Reasoning

GPT-5 (medium)

DeepSeek V3.1 (Reasoning)

31

GPT-5 (medium)

86

32
SimpleQA
87
30
MuSR
85

Frequently Asked Questions

Which is better, DeepSeek V3.1 (Reasoning) or GPT-5 (medium)?

GPT-5 (medium) scores higher overall with 70 vs 25, a difference of 45 points across all benchmarks.

Which is better for knowledge tasks, DeepSeek V3.1 (Reasoning) or GPT-5 (medium)?

GPT-5 (medium) leads in knowledge tasks with an average score of 88 vs 31.8.

Which is better for coding, DeepSeek V3.1 (Reasoning) or GPT-5 (medium)?

GPT-5 (medium) leads in coding with an average score of 83 vs 26.

Which is better for math, DeepSeek V3.1 (Reasoning) or GPT-5 (medium)?

GPT-5 (medium) leads in math with an average score of 92 vs 33.

Which is better for reasoning, DeepSeek V3.1 (Reasoning) or GPT-5 (medium)?

GPT-5 (medium) leads in reasoning with an average score of 86 vs 31.

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