What is the difference between OpenRouter Fusion · Budget (Jun 2026) and GPT-4o (Omni)?

OpenRouter Fusion · Budget (Jun 2026) is developed by OpenRouter while GPT-4o (Omni) is developed by OpenAI. OpenRouter Fusion · Budget (Jun 2026) has a 256K token context window vs GPT-4o (Omni)'s 128K. You can compare their actual outputs across 44 challenges on Rival to see how they differ in practice.

Which is better, OpenRouter Fusion · Budget (Jun 2026) or GPT-4o (Omni)?

It depends on your use case. OpenRouter Fusion · Budget (Jun 2026) and GPT-4o (Omni) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 44 challenges so you can judge which fits your needs best.

How can I compare OpenRouter Fusion · Budget (Jun 2026) and GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of OpenRouter Fusion · Budget (Jun 2026) and GPT-4o (Omni) 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 2026

OpenRouter Fusion · Budget (Jun 2026)vsGPT-4o (Omni)

OpenRouter Fusion · Budget (Jun 2026) has a larger context window than GPT-4o (Omni) (256K tokens vs 128K tokens).

OpenRouter Fusion · Budget (Jun 2026) and GPT-4o (Omni) compared across 44 shared prompts
Spec	OpenRouter Fusion · Budget (Jun 2026)	GPT-4o (Omni)
Input price	—	$2.5/M tokens
Output price	—	$10/M tokens
Context window	256K tokens	128K tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Jun 2026	May 2024