Claude Haiku 4.5 vs Claude Sonnet 4

Compare Claude Haiku 4.5 and Claude Sonnet 4, both from Anthropic, in 14 community votes, claude haiku 4.5 wins 78% of head-to-head duels, context windows of 200K vs 200K, tested across 33 shared challenges. Updated February 2026.

In 14 community votes, Claude Haiku 4.5 wins 78% of head-to-head duels. Claude Haiku 4.5 leads in Web Design. Based on blind community voting from the RIVAL open dataset of 14+ human preference judgments for this pair.