Claude Haiku 4.5 vs Grok Code Fast 1

Compare Claude Haiku 4.5 by Anthropic against Grok Code Fast 1 by xAI, in 33 community votes, claude haiku 4.5 wins 87% of head-to-head duels, context windows of 200K vs 256K, tested across 51 shared challenges. Updated February 2026.

In 33 community votes, Claude Haiku 4.5 wins 87% of head-to-head duels. Claude Haiku 4.5 leads in Reasoning, Web Design, Image Generation. Based on blind community voting from the RIVAL open dataset of 33+ human preference judgments for this pair.