What is the difference between Claude Fable 5.1 and NVIDIA Nemotron 3 Super (free)?

Claude Fable 5.1 is developed by Anthropic while NVIDIA Nemotron 3 Super (free) is developed by NVIDIA. Claude Fable 5.1 has a 1.0M token context window vs NVIDIA Nemotron 3 Super (free)'s 262K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5.1 or NVIDIA Nemotron 3 Super (free)?

It depends on your use case. Claude Fable 5.1 and NVIDIA Nemotron 3 Super (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How can I compare Claude Fable 5.1 and NVIDIA Nemotron 3 Super (free) on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and NVIDIA Nemotron 3 Super (free) 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

Claude Fable 5.1vsNVIDIA Nemotron 3 Super (free)

Claude Fable 5.1 has a larger context window than NVIDIA Nemotron 3 Super (free) (1.0M tokens vs 262K tokens).

Claude Fable 5.1 and NVIDIA Nemotron 3 Super (free) compared across 10 shared prompts
Spec	Claude Fable 5.1	NVIDIA Nemotron 3 Super (free)
Input price	$10/M tokens	—
Output price	$50/M tokens	—
Context window	1.0M tokens	262K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	Sep 2026	Mar 2026