What's new in 4.0
✨ New features
- Use Codex Computer Use with observation, session-specific permissions, and approval controls.
- Enjoy Fast mode across all Codex models and import skills from Codex plugins.
💪 Improvements
- See prompt answers, attachments, and tool-generated images more clearly in transcripts.
- Get smoother response streaming and faster project discovery.
🐛 Bug fixes
- Improved session startup and tool request reliability.
- Fixed layout issues in the changes card and compact subagent picker.