What is the difference between GPT Image 2.5 Sunburst and HiDream L1 (Fast)?

GPT Image 2.5 Sunburst is developed by OpenAI while HiDream L1 (Fast) is developed by PrunaAI. You can compare their actual outputs across 17 challenges on Rival to see how they differ in practice.

Which is better, GPT Image 2.5 Sunburst or HiDream L1 (Fast)?

It depends on your use case. GPT Image 2.5 Sunburst and HiDream L1 (Fast) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 17 challenges so you can judge which fits your needs best.

How can I compare GPT Image 2.5 Sunburst and HiDream L1 (Fast) on Rival?

This page shows a side-by-side comparison of GPT Image 2.5 Sunburst and HiDream L1 (Fast) 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

GPT Image 2.5 SunburstvsHiDream L1 (Fast)

GPT Image 2.5 Sunburst is the newer model, released after HiDream L1 (Fast).

GPT Image 2.5 Sunburst and HiDream L1 (Fast) compared across 17 shared prompts
Spec	GPT Image 2.5 Sunburst	HiDream L1 (Fast)
Input price	$5/M tokens	—
Output price	$30/M tokens	—
Parameters	Not disclosed	Not disclosed
Weights	Closed	Open
Free API (OpenRouter)	No	—
Released	Sep 2026	Apr 2025