Claude Sonnet 5 is now the default Quality model

Claude Sonnet 5 is now the default Quality model in Playcode.

New Pro chats use Sonnet 5 for the Quality path by default. Existing users who were following the previous default move with the Quality setting automatically, so they do not need to change anything in Preferences.

Opus 4.6 remains available in the model picker for work where you explicitly want Opus.