Gemma 3 27B vs GPT-OSS 120B

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

Quick Verdict

GPT-OSS 120B wins overall with a score of 42 vs 36 (6 point difference).GPT-OSS 120B wins 4 out of 4 categories.

Knowledge

GPT-OSS 120B

Gemma 3 27B

42.8

GPT-OSS 120B

48.8

45
MMLU
51
44
GPQA
50
42
SuperGPQA
48
40
OpenBookQA
46

Coding

GPT-OSS 120B

Gemma 3 27B

37

GPT-OSS 120B

43

37
HumanEval
43

Mathematics

GPT-OSS 120B

Gemma 3 27B

44

GPT-OSS 120B

50

45
AIME 2023
51
47
AIME 2024
53
46
AIME 2025
52
41
HMMT Feb 2023
47
43
HMMT Feb 2024
49
42
HMMT Feb 2025
48
44
BRUMO 2025
50

Reasoning

GPT-OSS 120B

Gemma 3 27B

42

GPT-OSS 120B

48

43
SimpleQA
49
41
MuSR
47

Frequently Asked Questions

Which is better, Gemma 3 27B or GPT-OSS 120B?

GPT-OSS 120B scores higher overall with 42 vs 36, a difference of 6 points across all benchmarks.

Which is better for knowledge tasks, Gemma 3 27B or GPT-OSS 120B?

GPT-OSS 120B leads in knowledge tasks with an average score of 48.8 vs 42.8.

Which is better for coding, Gemma 3 27B or GPT-OSS 120B?

GPT-OSS 120B leads in coding with an average score of 43 vs 37.

Which is better for math, Gemma 3 27B or GPT-OSS 120B?

GPT-OSS 120B leads in math with an average score of 50 vs 44.

Which is better for reasoning, Gemma 3 27B or GPT-OSS 120B?

GPT-OSS 120B leads in reasoning with an average score of 48 vs 42.