- The permission system is broken (this is such an obvious one that I wonder if it's specific to GPT5 or my environment). If you tell Codex to ask permission before running commands, it can't ever write to files. It also runs some commands (e.g. `sed`) without asking. Once you skip sandbox mode, it's difficult to go back.
- You can't paste or attach images (helpful for design iteration)
- No built-in login flow so you have to mess with your shell config and export your OpenAI key to all terminal processes.
- Terminal width isn't respected. Model responses always wrap at some hard-coded value. Resizing the window doesn't correctly redraw the screen.
- Some keyboard shortcuts aren't supported, like option+delete to delete words (which I use often, apparently...)
This is on MacOS, iTerm2, Fish shell. I guess everyone uses Cursor or Windsurf?