BackAnthropic·Claude APIStructured outputs now supports Claude Haiku 4.5Thursday, 4 December 2025Official notes on platform.claude.comFull release notesStructured outputs now supports Claude Haiku 4.5.Older · Nov 24, 2025We've launched Claude Opus 4.5, our most intelligent model combining maximum capability with practical…Newer · Dec 19, 2025We announced the deprecation of the Claude Haiku 3.5 model