Claude Opus 4 vs xAI: Grok 4

Compare Claude Opus 4 by Anthropic against xAI: Grok 4 by xAI, in 61 community votes, claude opus 4 wins 80% of head-to-head duels, context windows of 200K vs 256K, tested across 28 shared challenges. Updated March 2026.

In 61 community votes, Claude Opus 4 wins 80% of head-to-head duels. Claude Opus 4 leads in Web Design, Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 61+ human preference judgments for this pair.