Post by cat on X
cat@_catwu
XHaiku 4.5 is a workhorse that makes the coding experience in Claude Code feel really fast.
While Sonnet 4.5 remains the default, Haiku 4.5 now powers the Explore subagent which can rapidly gather context on your codebase to build apps even faster.
2.3K likes76 repliesPosted Oct 15, 2025