It's a self-hostable chat interface for the OpenAI GPT API.
From their Github Readme:
SlickGPT allows you to run your own local ChatGPT instance, host it yourself or just use our instance if you like. Users bring their own OpenAI API keys. SlickGPT offers them a very fancy user interface with a rich feature set like managing a local chat history (in the localStorage), a userless "Share" function for chats, a prominent context editor, and token cost calculation and distribution.
From their Github Readme:
SlickGPT allows you to run your own local ChatGPT instance, host it yourself or just use our instance if you like. Users bring their own OpenAI API keys. SlickGPT offers them a very fancy user interface with a rich feature set like managing a local chat history (in the localStorage), a userless "Share" function for chats, a prominent context editor, and token cost calculation and distribution.
https://github.com/ShipBit/slickgpt