If you have team/business subscription with ChatGPT and are looking for developer mode, until a few hours ago it was not possible to set it up due to a series of bugs introduced by openai itself, now instead it is possible to get there but hyper complicated(they will probably fix that too)
1. Create connectors from the chat as a user.
2. Go to Workspace Settings → Connectors → Draft, click on the three dots of the connector you created earlier, then click on Details → Preview.
3. You are now in Developer Mode.
Have a great time!
