What is the difference between Nemotron 3 Ultra and OpenAI o3?

Nemotron 3 Ultra is developed by NVIDIA while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Nemotron 3 Ultra or OpenAI o3?

It depends on your use case. Nemotron 3 Ultra and OpenAI o3 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 Nemotron 3 Ultra cost compared to OpenAI o3?

Nemotron 3 Ultra costs $0/M input tokens and OpenAI o3 costs $10/M input tokens. Nemotron 3 Ultra is $10.00/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 Nemotron 3 Ultra and OpenAI o3 on Rival?

This page shows a side-by-side comparison of Nemotron 3 Ultra and OpenAI o3 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

Nemotron 3 UltravsOpenAI o3

Nemotron 3 Ultra is cheaper than OpenAI o3 at $0/M vs $10/M input tokens.

Nemotron 3 Ultra and OpenAI o3 compared across 53 shared prompts
Spec	Nemotron 3 Ultra	OpenAI o3
Input price	Free	$10/M tokens
Output price	Free	$40/M tokens
Context window	1.0M tokens	—
Weights	Open	Closed
Free API (OpenRouter)	Yes (1 provider)	No
Released	Jun 2026	Apr 2025