What is the difference between Gemini 2.5 Flash Preview 05-20 (thinking) and Gemini 3.6 Flash?

Both are developed by Google AI but target different use cases. Gemini 2.5 Flash Preview 05-20 (thinking) has a 1.0M token context window vs Gemini 3.6 Flash's 1.0M. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview 05-20 (thinking) or Gemini 3.6 Flash?

It depends on your use case. Gemini 2.5 Flash Preview 05-20 (thinking) and Gemini 3.6 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview 05-20 (thinking) cost compared to Gemini 3.6 Flash?

Gemini 2.5 Flash Preview 05-20 (thinking) costs $0.15/M input tokens and Gemini 3.6 Flash costs $1.5/M input tokens. Gemini 2.5 Flash Preview 05-20 (thinking) is $1.35/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 2.5 Flash Preview 05-20 (thinking) and Gemini 3.6 Flash on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview 05-20 (thinking) and Gemini 3.6 Flash 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 Jul 2026

Gemini 2.5 Flash Preview 05-20 (thinking)vsGemini 3.6 Flash

Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper than Gemini 3.6 Flash at $0.15/M vs $1.5/M input tokens.

Gemini 2.5 Flash Preview 05-20 (thinking) and Gemini 3.6 Flash compared across 11 shared prompts
Spec	Gemini 2.5 Flash Preview 05-20 (thinking)	Gemini 3.6 Flash
Input price	$0.15/M tokens	$1.5/M tokens
Output price	$3.5/M tokens	$7.5/M tokens
Context window	1.0M tokens	1.0M tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Jul 2026