15th October 2025
While Sonnet 4.5 remains the default [in Claude Code], Haiku 4.5 now powers the Explore subagent which can rapidly gather context on your codebase to build apps even faster.
You can select Haiku 4.5 to be your default model in /model. When selected, you’ll automatically use Sonnet 4.5 in Plan mode and Haiku 4.5 for execution for smarter plans and faster results.
— Catherine Wu, Claude Code PM, Anthropic
Recent articles
- Porting the Moebius 0.2B image inpainting model to run in the browser with Claude Code - 22nd June 2026
- sqlite-utils 4.0rc1 adds migrations and nested transactions - 21st June 2026
- Datasette Apps: Host custom HTML applications inside Datasette - 18th June 2026