What is the difference between OpenRouter Fusion · Budget (Jun 2026) and GPT-4.5?

OpenRouter Fusion · Budget (Jun 2026) is developed by OpenRouter while GPT-4.5 is developed by OpenAI. OpenRouter Fusion · Budget (Jun 2026) has a 256K token context window vs GPT-4.5's 128K. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

Which is better, OpenRouter Fusion · Budget (Jun 2026) or GPT-4.5?

It depends on your use case. OpenRouter Fusion · Budget (Jun 2026) and GPT-4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 18 challenges so you can judge which fits your needs best.

How can I compare OpenRouter Fusion · Budget (Jun 2026) and GPT-4.5 on Rival?

This page shows a side-by-side comparison of OpenRouter Fusion · Budget (Jun 2026) and GPT-4.5 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.