code: https://github.com/kierangilliam/chatwithme.chat

Features

- Bring your own API token

- Chat history and API token is stored in your browser, not any 3rd party server

- Pay only for what you use

- Open source

- Uses gpt-3.5-turbo model

It will ask for your OpenAI access token. This token is never sent to a third-party server, only OpenAI.

It does not have feature parity with ChatGPT but it gives you the basics.