What is the difference between GPT-5.2 and Mercury?

GPT-5.2 is developed by OpenAI while Mercury is developed by Inception. GPT-5.2 has a 400K token context window vs Mercury's 32K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.2 or Mercury?

It depends on your use case. GPT-5.2 and Mercury 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 GPT-5.2 cost compared to Mercury?

GPT-5.2 costs $1.75/M input tokens and Mercury costs $10/M input tokens. GPT-5.2 is $8.25/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-5.2 and Mercury on Rival?

This page shows a side-by-side comparison of GPT-5.2 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 Dec 2025

GPT-5.2vsMercury

GPT-5.2 is cheaper than Mercury at $1.75/M vs $10/M input tokens.

GPT-5.2 and Mercury compared across 53 shared prompts
Spec	GPT-5.2	Mercury
Input price	$1.75/M tokens	$10/M tokens
Output price	$14/M tokens	$10/M tokens
Context window	400K tokens	32K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Dec 2025	Jun 2025