This resolves as positive if Open-AI publishes a paper or webpage implicitly declaring GPT-4 “released” or “complete”, showcasing some examples of what it can do, and offering some form of use in some reasonable timescale to some outside parties (researchers, corporate partners, people who want to play around with it, etc). A product is “GPT-4” if it is either named GPT-4, or is a clear successor to GPT-3 to a degree similar to how GPT-3 was a successor to GPT-2 (and not branded as a newer version of GPT-3, eg ChatGPT3).

This is question #39 in the Astral Codex Ten 2023 Prediction Contest. The contest rules and full list of questions are available here.