Seed-2.0-Mini vs GPT-OSS 20B

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

Seed-2.0-Mini is clearly ahead on the aggregate, 53 to 35. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Seed-2.0-Mini's sharpest advantage is in multimodal & grounded, where it averages 73.1 against 36. The single biggest benchmark swing on the page is MMMU-Pro, 74 to 31.

Seed-2.0-Mini gives you the larger context window at 256K, compared with 128K for GPT-OSS 20B.

Quick Verdict

Pick Seed-2.0-Mini 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

Seed-2.0-Mini

Seed-2.0-Mini

46.2

GPT-OSS 20B

35.4

43
Terminal-Bench 2.0
35
53
BrowseComp
42
45
OSWorld-Verified
31

Coding

Seed-2.0-Mini

Seed-2.0-Mini

24.7

GPT-OSS 20B

14.5

55
HumanEval
23
22
SWE-bench Verified
14
21
LiveCodeBench
11
29
SWE-bench Pro
18

Multimodal & Grounded

Seed-2.0-Mini

Seed-2.0-Mini

73.1

GPT-OSS 20B

36

74
MMMU-Pro
31
72
OfficeQA Pro
42

Reasoning

Seed-2.0-Mini

Seed-2.0-Mini

64.8

GPT-OSS 20B

40.4

59
SimpleQA
29
57
MuSR
27
73
BBH
62
68
LongBench v2
48
72
MRCRv2
48

Knowledge

Seed-2.0-Mini

Seed-2.0-Mini

44.6

GPT-OSS 20B

29

62
MMLU
31
61
GPQA
30
59
SuperGPQA
28
57
OpenBookQA
26
62
MMLU-Pro
53
1
HLE
1
54
FrontierScience
34

Instruction Following

Seed-2.0-Mini

Seed-2.0-Mini

80

GPT-OSS 20B

67

80
IFEval
67

Multilingual

Seed-2.0-Mini

Seed-2.0-Mini

71.8

GPT-OSS 20B

59.7

75
MGSM
61
70
MMLU-ProX
59

Mathematics

Seed-2.0-Mini

Seed-2.0-Mini

65.1

GPT-OSS 20B

43.1

62
AIME 2023
31
64
AIME 2024
33
63
AIME 2025
32
58
HMMT Feb 2023
27
60
HMMT Feb 2024
29
59
HMMT Feb 2025
28
61
BRUMO 2025
30
70
MATH-500
59

Frequently Asked Questions

Which is better, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini is ahead overall, 53 to 35. The biggest single separator in this matchup is MMMU-Pro, where the scores are 74 and 31.

Which is better for knowledge tasks, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for knowledge tasks in this comparison, averaging 44.6 versus 29. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for coding in this comparison, averaging 24.7 versus 14.5. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Which is better for math, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for math in this comparison, averaging 65.1 versus 43.1. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for reasoning in this comparison, averaging 64.8 versus 40.4. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for agentic tasks in this comparison, averaging 46.2 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, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for multimodal and grounded tasks in this comparison, averaging 73.1 versus 36. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for instruction following in this comparison, averaging 80 versus 67. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Seed-2.0-Mini or GPT-OSS 20B?

Seed-2.0-Mini has the edge for multilingual tasks in this comparison, averaging 71.8 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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