GPT-OSS 20B vs DBRX Instruct

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

GPT-OSS 20B has the cleaner overall profile here, landing at 34 versus 32. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

GPT-OSS 20B gives you the larger context window at 128K, compared with 32K for DBRX Instruct.

Quick Verdict

Pick GPT-OSS 20B if you want the stronger benchmark profile. DBRX Instruct only becomes the better choice if coding is the priority.

Knowledge

DBRX Instruct

GPT-OSS 20B

28.2

DBRX Instruct

73.7

31
MMLU
73.7
30
GPQA
-
28
SuperGPQA
-
26
OpenBookQA
-
53
MMLU-Pro
-
1
HLE
-

Coding

DBRX Instruct

GPT-OSS 20B

16

DBRX Instruct

70.1

23
HumanEval
70.1
14
SWE-bench Verified
-
11
LiveCodeBench
-

Mathematics

GPT-OSS 20B
31
AIME 2023
-
33
AIME 2024
-
32
AIME 2025
-
27
HMMT Feb 2023
-
29
HMMT Feb 2024
-
28
HMMT Feb 2025
-
30
BRUMO 2025
-
59
MATH-500
-

Reasoning

GPT-OSS 20B
29
SimpleQA
-
27
MuSR
-
62
BBH
-

Instruction Following

GPT-OSS 20B
67
IFEval
-

Multilingual

GPT-OSS 20B
61
MGSM
-

Frequently Asked Questions

Which is better, GPT-OSS 20B or DBRX Instruct?

GPT-OSS 20B is ahead overall, 34 to 32. The biggest single separator in this matchup is HumanEval, where the scores are 23 and 70.1.

Which is better for knowledge tasks, GPT-OSS 20B or DBRX Instruct?

DBRX Instruct has the edge for knowledge tasks in this comparison, averaging 73.7 versus 28.2. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for coding, GPT-OSS 20B or DBRX Instruct?

DBRX Instruct has the edge for coding in this comparison, averaging 70.1 versus 16. Inside this category, HumanEval is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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