What is the difference between Claude Opus 4 and Grok 3 Beta?

Claude Opus 4 is developed by Anthropic while Grok 3 Beta is developed by xAI. Claude Opus 4 has a 200K token context window vs Grok 3 Beta's 131K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Grok 3 Beta?

It depends on your use case. Claude Opus 4 and Grok 3 Beta 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 Claude Opus 4 cost compared to Grok 3 Beta?

Claude Opus 4 costs $15/M input tokens and Grok 3 Beta costs $2/M input tokens. Grok 3 Beta is $13.00/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 and Grok 3 Beta on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Grok 3 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.

Updated May 2025

Claude Opus 4vsGrok 3 Beta

Grok 3 Beta is cheaper than Claude Opus 4 at $2/M vs $15/M input tokens.

Claude Opus 4 and Grok 3 Beta compared across 53 shared prompts
Spec	Claude Opus 4	Grok 3 Beta
Input price	$15/M tokens	$2/M tokens
Output price	$75/M tokens	$4/M tokens
Context window	200K tokens	131K tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	May 2025	Apr 2025