What is the difference between Gemini 3.8 Flash and Mercury 2?

Gemini 3.8 Flash is developed by Google AI while Mercury 2 is developed by Inception. Gemini 3.8 Flash has a 1.0M token context window vs Mercury 2's 128K. 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 Mercury 2?

It depends on your use case. Gemini 3.8 Flash and Mercury 2 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 Mercury 2?

Gemini 3.8 Flash costs $0.75/M input tokens and Mercury 2 costs $0.25/M input tokens. Mercury 2 is $0.50/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 Mercury 2 on Rival?

This page shows a side-by-side comparison of Gemini 3.8 Flash and Mercury 2 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 FlashvsMercury 2

Mercury 2 is cheaper than Gemini 3.8 Flash at $0.25/M vs $0.75/M input tokens.

Gemini 3.8 Flash and Mercury 2 compared across 53 shared prompts
Spec	Gemini 3.8 Flash	Mercury 2
Input price	$0.75/M tokens	$0.25/M tokens
Output price	$3.75/M tokens	$0.75/M tokens
Context window	1.0M tokens	128K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Sep 2026	Mar 2026