Gemma 3 27B vs GPT-5.2-Codex

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

Quick Verdict

GPT-5.2-Codex wins overall with a score of 82 vs 36 (46 point difference).GPT-5.2-Codex wins 4 out of 4 categories.

Knowledge

GPT-5.2-Codex

Gemma 3 27B

42.8

GPT-5.2-Codex

96

45
MMLU
99
44
GPQA
97
42
SuperGPQA
95
40
OpenBookQA
93

Coding

GPT-5.2-Codex

Gemma 3 27B

37

GPT-5.2-Codex

95

37
HumanEval
95

Mathematics

GPT-5.2-Codex

Gemma 3 27B

44

GPT-5.2-Codex

97.1

45
AIME 2023
99
47
AIME 2024
99
46
AIME 2025
98
41
HMMT Feb 2023
95
43
HMMT Feb 2024
97
42
HMMT Feb 2025
96
44
BRUMO 2025
96

Reasoning

GPT-5.2-Codex

Gemma 3 27B

42

GPT-5.2-Codex

94

43
SimpleQA
95
41
MuSR
93

Frequently Asked Questions

Which is better, Gemma 3 27B or GPT-5.2-Codex?

GPT-5.2-Codex scores higher overall with 82 vs 36, a difference of 46 points across all benchmarks.

Which is better for knowledge tasks, Gemma 3 27B or GPT-5.2-Codex?

GPT-5.2-Codex leads in knowledge tasks with an average score of 96 vs 42.8.

Which is better for coding, Gemma 3 27B or GPT-5.2-Codex?

GPT-5.2-Codex leads in coding with an average score of 95 vs 37.

Which is better for math, Gemma 3 27B or GPT-5.2-Codex?

GPT-5.2-Codex leads in math with an average score of 97.1 vs 44.

Which is better for reasoning, Gemma 3 27B or GPT-5.2-Codex?

GPT-5.2-Codex leads in reasoning with an average score of 94 vs 42.