Claude Opus 5.5vsGrok 3 Mini Beta

Claude Opus 5.5 is developed by Anthropic while Grok 3 Mini Beta is developed by xAI. Claude Opus 5.5 has a 1.0M token context window vs Grok 3 Mini Beta's 131K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 5.5 and Grok 3 Mini Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

Claude Opus 5.5 costs $4/M input tokens and Grok 3 Mini Beta costs $0.4/M input tokens. Grok 3 Mini Beta is $3.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude Opus 5.5 and Grok 3 Mini Beta 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.