What is the difference between Gemini 3.8 Flash and o3 Mini?

Gemini 3.8 Flash is developed by Google AI while o3 Mini is developed by OpenAI. Gemini 3.8 Flash has a 1.0M token context window vs o3 Mini's 64K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.8 Flash or o3 Mini?

It depends on your use case. Gemini 3.8 Flash and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Gemini 3.8 Flash cost compared to o3 Mini?

Gemini 3.8 Flash costs $0.75/M input tokens and o3 Mini costs $1.1/M input tokens. Gemini 3.8 Flash is $0.35/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 Gemini 3.8 Flash and o3 Mini on Rival?

This page shows a side-by-side comparison of Gemini 3.8 Flash and o3 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 Sep 2026

Gemini 3.8 Flashvso3 Mini

Gemini 3.8 Flash is cheaper than o3 Mini at $0.75/M vs $1.1/M input tokens.

Gemini 3.8 Flash and o3 Mini compared across 53 shared prompts
Spec	Gemini 3.8 Flash	o3 Mini
Input price	$0.75/M tokens	$1.1/M tokens
Output price	$3.75/M tokens	$4.4/M tokens
Context window	1.0M tokens	64K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2026	Dec 2024