Nemotron 3 Super 120B A12B vs GPT-OSS 20B

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

Nemotron 3 Super 120B A12B is clearly ahead on the aggregate, 61 to 35. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Nemotron 3 Super 120B A12B's sharpest advantage is in mathematics, where it averages 74.6 against 43.1. The single biggest benchmark swing on the page is MMLU, 68 to 31.

Nemotron 3 Super 120B A12B gives you the larger context window at 256K, compared with 128K for GPT-OSS 20B.

Quick Verdict

Pick Nemotron 3 Super 120B A12B if you want the stronger benchmark profile. GPT-OSS 20B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Agentic

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

55.3

GPT-OSS 20B

35.4

55
Terminal-Bench 2.0
35
59
BrowseComp
42
53
OSWorld-Verified
31

Coding

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

44.2

GPT-OSS 20B

14.5

59
HumanEval
23
46
SWE-bench Verified
14
42
LiveCodeBench
11
46
SWE-bench Pro
18

Multimodal & Grounded

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

60.4

GPT-OSS 20B

36

55
MMMU-Pro
31
67
OfficeQA Pro
42

Reasoning

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

71.8

GPT-OSS 20B

40.4

64
SimpleQA
29
62
MuSR
27
88
BBH
62
77
LongBench v2
48
77
MRCRv2
48

Knowledge

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

55.8

GPT-OSS 20B

29

68
MMLU
31
67
GPQA
30
65
SuperGPQA
28
63
OpenBookQA
26
75
MMLU-Pro
53
16
HLE
1
66
FrontierScience
34

Instruction Following

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

86

GPT-OSS 20B

67

86
IFEval
67

Multilingual

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

81.5

GPT-OSS 20B

59.7

86
MGSM
61
79
MMLU-ProX
59

Mathematics

Nemotron 3 Super 120B A12B

Nemotron 3 Super 120B A12B

74.6

GPT-OSS 20B

43.1

67
AIME 2023
31
69
AIME 2024
33
68
AIME 2025
32
63
HMMT Feb 2023
27
65
HMMT Feb 2024
29
64
HMMT Feb 2025
28
66
BRUMO 2025
30
85
MATH-500
59

Frequently Asked Questions

Which is better, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B is ahead overall, 61 to 35. The biggest single separator in this matchup is MMLU, where the scores are 68 and 31.

Which is better for knowledge tasks, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for knowledge tasks in this comparison, averaging 55.8 versus 29. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for coding in this comparison, averaging 44.2 versus 14.5. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for math, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for math in this comparison, averaging 74.6 versus 43.1. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for reasoning in this comparison, averaging 71.8 versus 40.4. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for agentic tasks in this comparison, averaging 55.3 versus 35.4. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for multimodal and grounded tasks in this comparison, averaging 60.4 versus 36. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for instruction following in this comparison, averaging 86 versus 67. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Nemotron 3 Super 120B A12B or GPT-OSS 20B?

Nemotron 3 Super 120B A12B has the edge for multilingual tasks in this comparison, averaging 81.5 versus 59.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 12, 2026

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