o1 vs DeepSeek V3.1 (Reasoning)

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

o1 is clearly ahead on the aggregate, 51 to 37. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

o1's sharpest advantage is in knowledge, where it averages 83.8 against 31.7. The single biggest benchmark swing on the page is MMLU, 91.8 to 34.

o1 gives you the larger context window at 200K, compared with 128K for DeepSeek V3.1 (Reasoning).

Quick Verdict

Pick o1 if you want the stronger benchmark profile. DeepSeek V3.1 (Reasoning) only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Knowledge

o1

o1

83.8

DeepSeek V3.1 (Reasoning)

31.7

91.8
MMLU
34
75.7
GPQA
33
-
SuperGPQA
31
-
OpenBookQA
29
-
MMLU-Pro
53
-
HLE
10

Coding

o1

o1

41

DeepSeek V3.1 (Reasoning)

18.7

41
SWE-bench Verified
14
-
HumanEval
26
-
LiveCodeBench
16

Mathematics

o1

o1

74.3

DeepSeek V3.1 (Reasoning)

36.6

74.3
AIME 2024
36
-
AIME 2023
34
-
AIME 2025
35
-
HMMT Feb 2023
30
-
HMMT Feb 2024
32
-
HMMT Feb 2025
31
-
BRUMO 2025
33
-
MATH-500
62

Reasoning

DeepSeek V3.1 (Reasoning)
-
SimpleQA
32
-
MuSR
30
-
BBH
64

Instruction Following

o1

o1

92.2

DeepSeek V3.1 (Reasoning)

70

92.2
IFEval
70

Multilingual

DeepSeek V3.1 (Reasoning)
-
MGSM
64

Frequently Asked Questions

Which is better, o1 or DeepSeek V3.1 (Reasoning)?

o1 is ahead overall, 51 to 37. The biggest single separator in this matchup is MMLU, where the scores are 91.8 and 34.

Which is better for knowledge tasks, o1 or DeepSeek V3.1 (Reasoning)?

o1 has the edge for knowledge tasks in this comparison, averaging 83.8 versus 31.7. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, o1 or DeepSeek V3.1 (Reasoning)?

o1 has the edge for coding in this comparison, averaging 41 versus 18.7. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.

Which is better for math, o1 or DeepSeek V3.1 (Reasoning)?

o1 has the edge for math in this comparison, averaging 74.3 versus 36.6. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for instruction following, o1 or DeepSeek V3.1 (Reasoning)?

o1 has the edge for instruction following in this comparison, averaging 92.2 versus 70. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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