Grok Code Fast 1 vs Claude Sonnet 4

Compare Grok Code Fast 1 by xAI against Claude Sonnet 4 by Anthropic, in 203 community votes, claude sonnet 4 wins 68% of head-to-head duels, context windows of 256K vs 200K, tested across 31 shared challenges. Updated February 2026.

In 203 community votes, Claude Sonnet 4 wins 68% of head-to-head duels. Grok Code Fast 1 leads in Reasoning, Analysis, while Claude Sonnet 4 leads in Web Design, Image Generation, Conversation. Based on blind community voting from the RIVAL open dataset of 203+ human preference judgments for this pair.