Open AI, What's the Key Piece?

OpenAI is obviously the institution that's doing a lot of work on AI and ML. Let's do some quick definitions to ground everyone. You said GPT, what's that sound for? Is it a thing that sounds for something? I actually don't remember general purpose transformers or something like that. Yeah, so basically I think the key piece is transformers. So you know, there was, I guess, a recent breakthrough.