✨ Highlights
- API support for
gpt-5.3-codexand added support forgpt-5.3-codex-spark- Note: at the time of this release Spark requires the ChatGPT Pro ($200/m) plan
- Analytics page (Cmd+Shift+Y) to provide a convenient look into spend and model performance
- "Auto" agent mode which delegates selection of exec/plan/ask/etc. mode to the agent
- Immersive Review (Shift+I), which provides an IDE-like, full-file review experience
- We are actively fixing some performance issues with large files, consider this feature a preview of things to come
- Nightly release channel available when clicking the version number in the top left of Mux
Misc.
- Contains many improvements to the mobile experience
- Simplified the Chat Input controls, consolidating help indicators
- Added first-class support for creating creating skills in the Chat with Mux help workspace