What is the difference between GPT-3.5 Turbo and Mercury?

GPT-3.5 Turbo is developed by OpenAI while Mercury is developed by Inception. GPT-3.5 Turbo has a 16K token context window vs Mercury's 32K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-3.5 Turbo or Mercury?

It depends on your use case. GPT-3.5 Turbo and Mercury each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does GPT-3.5 Turbo cost compared to Mercury?

GPT-3.5 Turbo costs $1.5/M input tokens and Mercury costs $10/M input tokens. GPT-3.5 Turbo is $8.50/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 GPT-3.5 Turbo and Mercury on Rival?

This page shows a side-by-side comparison of GPT-3.5 Turbo and Mercury 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 Jun 2025

GPT-3.5 TurbovsMercury

GPT-3.5 Turbo is cheaper than Mercury at $1.5/M vs $10/M input tokens.

GPT-3.5 Turbo and Mercury compared across 54 shared prompts
Spec	GPT-3.5 Turbo	Mercury
Input price	$1.5/M tokens	$10/M tokens
Output price	$2/M tokens	$10/M tokens
Context window	16K tokens	32K tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Mar 2022	Jun 2025