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How long can you chat on ChatGPT? Once you hit the limit, only a new chat works

ChatGPT may start forgetting early context after extended conversations, and very long chats can eventually end, a report said. Users need to consider both the context window, which is based on tokens rather than time or message count, and a maximum thread length. When the thread-length limit is reached, ChatGPT displays a notice saying the conversation has hit its maximum length and prompts users to start a new chat.