What is the difference between Gemma 4 31B and GPT-4o mini?

Gemma 4 31B is developed by Google AI while GPT-4o mini is developed by OpenAI. Gemma 4 31B has a 262K token context window vs GPT-4o mini's 128K. You can compare their actual outputs across 44 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 31B or GPT-4o mini?

It depends on your use case. Gemma 4 31B and GPT-4o mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 44 challenges so you can judge which fits your needs best.

How much does Gemma 4 31B cost compared to GPT-4o mini?

Gemma 4 31B costs $0.14/M input tokens and GPT-4o mini costs $0.15/M input tokens. Gemma 4 31B is $0.01/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemma 4 31B and GPT-4o mini on Rival?

This page shows a side-by-side comparison of Gemma 4 31B and GPT-4o mini across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Apr 2026

Gemma 4 31BvsGPT-4o mini

Gemma 4 31B is cheaper than GPT-4o mini at $0.14/M vs $0.15/M input tokens.

Gemma 4 31B and GPT-4o mini compared across 44 shared prompts
Spec	Gemma 4 31B	GPT-4o mini
Input price	$0.14/M tokens	$0.15/M tokens
Output price	$0.4/M tokens	$0.6/M tokens
Context window	262K tokens	128K tokens
Weights	Open	Closed
Free API (OpenRouter)	Yes (1 provider)	No
Released	Apr 2026	Jul 2024