SublimeGPT is a free Chrome add-on developed by Bonfire Labs that allows users to access ChatGPT, a language model, on any website. With SublimeGPT, users can view ChatGPT responses alongside Google search results and create prompt shortcuts to use on selected text in any web page.

To open the chat feature on any website, users need to ensure they are logged into their ChatGPT account. They can then press Ctrl+Up Arrow (Cmd+Up Arrow on Mac) or click the extension icon on the navigation bar. The keyboard shortcut can be customized in the browser's extension shortcuts page.

It's important to note that SublimeGPT is a helper tool and is not affiliated with OpenAI or ChatGPT. It simply provides a convenient way to access ChatGPT and enhance the browsing experience by integrating language model capabilities.