What is the difference between Claude Opus 4.8 and Nemotron 3 Ultra?

Claude Opus 4.8 is developed by Anthropic while Nemotron 3 Ultra is developed by NVIDIA. Claude Opus 4.8 has a 1.0M token context window vs Nemotron 3 Ultra's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.8 or Nemotron 3 Ultra?

It depends on your use case. Claude Opus 4.8 and Nemotron 3 Ultra 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 Claude Opus 4.8 cost compared to Nemotron 3 Ultra?

Claude Opus 4.8 costs $5/M input tokens and Nemotron 3 Ultra costs $0/M input tokens. Nemotron 3 Ultra is $5.00/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 Claude Opus 4.8 and Nemotron 3 Ultra on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 and Nemotron 3 Ultra 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

Claude Opus 4.8vsNemotron 3 Ultra

Nemotron 3 Ultra is cheaper than Claude Opus 4.8 at $0/M vs $5/M input tokens.

Claude Opus 4.8 and Nemotron 3 Ultra compared across 54 shared prompts
Spec	Claude Opus 4.8	Nemotron 3 Ultra
Input price	$5/M tokens	Free
Output price	$25/M tokens	Free
Context window	1.0M tokens	1.0M tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	May 2026	Jun 2026