Claude Opus 4.1 vs Grok Code Fast 1

Compare Claude Opus 4.1 by Anthropic against Grok Code Fast 1 by xAI, in 75 community votes, claude opus 4.1 wins 85% of head-to-head duels, context windows of 200K vs 256K, tested across 25 shared challenges. Updated March 2026.

In 75 community votes, Claude Opus 4.1 wins 85% of head-to-head duels. Claude Opus 4.1 leads in Web Design, Image Generation, Analysis. Based on blind community voting from the Rival open dataset of 75+ human preference judgments for this pair.

Web Design: Claude Opus 4.1 wins 97% of votes
Image Generation: Claude Opus 4.1 wins 88% of votes
Conversation: Claude Opus 4.1 and Grok Code Fast 1 are tied
Analysis: Claude Opus 4.1 wins 60% of votes
Reasoning: Claude Opus 4.1 wins 75% of votes
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