Fast mode, a reasoning slider, Claude Haiku 5.5, and sound in iOS previews.
- Fast mode for GPT and Opus models on the web
- A reasoning slider in the web model picker sets how hard the agent thinks
- Claude Haiku 5.5 replaces Claude Haiku 4.5 in the model picker
- Sound in iOS previews: native iOS and React Native previews play your app's sound, and apps that record can hear your microphone (rolled out Oct 6–8)
- If your free first build finishes while you're away, we email you that your app is ready