Claude Opus 5 is now the default model

New builds and follow-up edits now run on Claude Opus 5 by default. It is a step up from Opus 4.8 on multi-file features and longer builds, and it reasons before it acts on every turn, so builds spend a little more thinking up front and less time backtracking.

Claude Sonnet 5 stays in the model selector for anyone who prefers it. If you had Opus 4.8 selected, your next build uses Opus 5.