What is the difference between GPT-5.5 and Hy4 Preview?

GPT-5.5 is developed by OpenAI while Hy4 Preview is developed by Tencent. GPT-5.5 has a 1.1M token context window vs Hy4 Preview's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.5 or Hy4 Preview?

It depends on your use case. GPT-5.5 and Hy4 Preview 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-5.5 cost compared to Hy4 Preview?

GPT-5.5 costs $5/M input tokens and Hy4 Preview costs $0.834/M input tokens. Hy4 Preview is $4.17/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-5.5 and Hy4 Preview on Rival?

This page shows a side-by-side comparison of GPT-5.5 and Hy4 Preview 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 Aug 2026

GPT-5.5vsHy4 Preview

Hy4 Preview is cheaper than GPT-5.5 at $0.834/M vs $5/M input tokens.

GPT-5.5 and Hy4 Preview compared across 54 shared prompts
Spec	GPT-5.5	Hy4 Preview
Input price	$5/M tokens	$0.834/M tokens
Output price	$30/M tokens	$2.501/M tokens
Context window	1.1M tokens	1.0M tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Apr 2026	Aug 2026