The punchline is a play on words, combining "GPT" (referring to the language model) with "keyless." In this context, "keyless" means lacking a key, like a keyless entry system for a door. The joke implies that the GPT (which stands for Generative Pre-trained Transformer) doesn't have the ability to open a door because it's "keyless." It's a humorous way to highlight the fact that the GPT model doesn't possess physical capabilities like opening doors.
(, Mon 8 May 2023, 22:46, archived)