GPT-J and GPT-3 combined with Pen.el (libre copilot for Emacs)
mullikine.github.io
mullikine.github.io
https://www.reddit.com/r/emacs/comments/owwcwv/gptj_support_...
Get yourself a key if you'd like to try it out.
https://apps.aixsolutionsgroup.com/
You may make composite 'prompt functions' that combine both language models, and also fine-tuned OpenAI models and use them to extend emacs in all directions!