What is the difference between Claude Sonnet 4.5 and Nova Premier 1.0?

Claude Sonnet 4.5 is developed by Anthropic while Nova Premier 1.0 is developed by Amazon. Claude Sonnet 4.5 has a 200K token context window vs Nova Premier 1.0's 1.0M. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.5 or Nova Premier 1.0?

It depends on your use case. Claude Sonnet 4.5 and Nova Premier 1.0 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4.5 cost compared to Nova Premier 1.0?

Claude Sonnet 4.5 costs $3/M input tokens and Nova Premier 1.0 costs $2.5/M input tokens. Nova Premier 1.0 is $0.50/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 Sonnet 4.5 and Nova Premier 1.0 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.5 and Nova Premier 1.0 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 Oct 2025

Claude Sonnet 4.5vsNova Premier 1.0

Nova Premier 1.0 is cheaper than Claude Sonnet 4.5 at $2.5/M vs $3/M input tokens.

Claude Sonnet 4.5 and Nova Premier 1.0 compared across 41 shared prompts
Spec	Claude Sonnet 4.5	Nova Premier 1.0
Input price	$3/M tokens	$2.5/M tokens
Output price	$15/M tokens	$12.5/M tokens
Context window	200K tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2025	Oct 2025
SWE-bench Verified	77.2%	42.4%