Gemma 3 27B vs GPT-5 (high)

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

Quick Verdict

GPT-5 (high) wins overall with a score of 72 vs 36 (36 point difference).GPT-5 (high) wins 4 out of 4 categories.

Knowledge

GPT-5 (high)

Gemma 3 27B

42.8

GPT-5 (high)

90

45
MMLU
93
44
GPQA
91
42
SuperGPQA
89
40
OpenBookQA
87

Coding

GPT-5 (high)

Gemma 3 27B

37

GPT-5 (high)

85

37
HumanEval
85

Mathematics

GPT-5 (high)

Gemma 3 27B

44

GPT-5 (high)

94

45
AIME 2023
95
47
AIME 2024
97
46
AIME 2025
96
41
HMMT Feb 2023
91
43
HMMT Feb 2024
93
42
HMMT Feb 2025
92
44
BRUMO 2025
94

Reasoning

GPT-5 (high)

Gemma 3 27B

42

GPT-5 (high)

88

43
SimpleQA
89
41
MuSR
87

Frequently Asked Questions

Which is better, Gemma 3 27B or GPT-5 (high)?

GPT-5 (high) scores higher overall with 72 vs 36, a difference of 36 points across all benchmarks.

Which is better for knowledge tasks, Gemma 3 27B or GPT-5 (high)?

GPT-5 (high) leads in knowledge tasks with an average score of 90 vs 42.8.

Which is better for coding, Gemma 3 27B or GPT-5 (high)?

GPT-5 (high) leads in coding with an average score of 85 vs 37.

Which is better for math, Gemma 3 27B or GPT-5 (high)?

GPT-5 (high) leads in math with an average score of 94 vs 44.

Which is better for reasoning, Gemma 3 27B or GPT-5 (high)?

GPT-5 (high) leads in reasoning with an average score of 88 vs 42.