1) Epstein GPT

This GPT allowed you to speak directly with the Jeffrey Epstein court documents. Epstein GPT was banned by OpenAI shortly after it was created, and there has yet to be a replacement. X user @PatrickJBlum claimed responsibility for this one. The chatbot is informed by hundreds of pages of the newly unsealed Jeffrey Epstein documents. It allowed users to speak directly with the documents, and quickly search and synthesize any keywords found in them.
The removal of Epstein GPT actually sparked a decent bit of controversy, as many felt that this was a genuinely useful tool for journalists and those doing research on the documents. But if you really need to use it, don’t worry, someone made another version of EpsteinGPT, that OpenAI hasn’t caught yet.