benchlm.ai

Gemini 3.1 Flash-Lite vs GPT-OSS 20B

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

Quick Verdict

Gemini 3.1 Flash-Lite wins overall with a score of 53 vs 22 (31 point difference).Gemini 3.1 Flash-Lite wins 4 out of 4 categories.

Gemini 3.1 Flash-Lite

CreatorGoogle
TypeProprietary
Context1M
Score53

GPT-OSS 20B

CreatorOpenAI
TypeOpen Weight
Context128K
Score22

Knowledge

Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite

60.8

GPT-OSS 20B

28.8

63
MMLU
31
62
GPQA
30
60
SuperGPQA
28
58
OpenBookQA
26

Coding

Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite

55

GPT-OSS 20B

23

55
HumanEval
23

Mathematics

Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite

62

GPT-OSS 20B

30

63
AIME 2023
31
65
AIME 2024
33
64
AIME 2025
32
59
HMMT Feb 2023
27
61
HMMT Feb 2024
29
60
HMMT Feb 2025
28
62
BRUMO 2025
30

Reasoning

Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite

59

GPT-OSS 20B

28

60
SimpleQA
29
58
MuSR
27

Frequently Asked Questions

Which is better, Gemini 3.1 Flash-Lite or GPT-OSS 20B?

Gemini 3.1 Flash-Lite scores higher overall with 53 vs 22, a difference of 31 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3.1 Flash-Lite or GPT-OSS 20B?

Gemini 3.1 Flash-Lite leads in knowledge tasks with an average score of 60.8 vs 28.8.

Which is better for coding, Gemini 3.1 Flash-Lite or GPT-OSS 20B?

Gemini 3.1 Flash-Lite leads in coding with an average score of 55 vs 23.

Which is better for math, Gemini 3.1 Flash-Lite or GPT-OSS 20B?

Gemini 3.1 Flash-Lite leads in math with an average score of 62 vs 30.

Which is better for reasoning, Gemini 3.1 Flash-Lite or GPT-OSS 20B?

Gemini 3.1 Flash-Lite leads in reasoning with an average score of 59 vs 28.

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