What is the difference between Gemini 2.0 Flash Thinking and OpenAI o3?

Gemini 2.0 Flash Thinking is developed by Google AI while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 21 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.0 Flash Thinking or OpenAI o3?

It depends on your use case. Gemini 2.0 Flash Thinking and OpenAI o3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 21 challenges so you can judge which fits your needs best.

How much does Gemini 2.0 Flash Thinking cost compared to OpenAI o3?

Gemini 2.0 Flash Thinking costs $0.25/M input tokens and OpenAI o3 costs $10/M input tokens. Gemini 2.0 Flash Thinking is $9.75/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 2.0 Flash Thinking and OpenAI o3 on Rival?

This page shows a side-by-side comparison of Gemini 2.0 Flash Thinking and OpenAI o3 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 2025

Gemini 2.0 Flash ThinkingvsOpenAI o3

Gemini 2.0 Flash Thinking is cheaper than OpenAI o3 at $0.25/M vs $10/M input tokens.

Gemini 2.0 Flash Thinking and OpenAI o3 compared across 21 shared prompts
Spec	Gemini 2.0 Flash Thinking	OpenAI o3
Input price	$0.25/M tokens	$10/M tokens
Output price	$0.5/M tokens	$40/M tokens
Context window	500K tokens	—
Parameters	Not disclosed	Not disclosed
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Dec 2024	Apr 2025