Claude Opus 4.1 vs xAI: Grok 4

Compare Claude Opus 4.1 by Anthropic against xAI: Grok 4 by xAI, in 17 community votes, claude opus 4.1 wins 71% of head-to-head duels, context windows of 200K vs 256K, tested across 27 shared challenges. Updated February 2026.

In 17 community votes, Claude Opus 4.1 wins 71% of head-to-head duels. Claude Opus 4.1 leads in Web Design. Based on blind community voting from the RIVAL open dataset of 17+ human preference judgments for this pair.