"One theory about why ChatGPT's web traffic dropped over the summer is that school was out, which would help explain why the traffic trend stabilized in August as schoolchildren in the US were back in class in greater numbers toward the end of the month," David F. Carr, a senior insights manager at Similarweb, wrote in the report.

Before Meta's Threads assumed the title in July, ChatGPT was the fastest-growing app ever when it reached 100 million users in two months.

Some of that hype was prompted by students, leading to professors finding ways to combat ChatGPT plagiarism, and one Princeton student launching GPTZero to detect if an essay was written by AI.

But it's also being used in the workplace, with employees using ChatGPT to write code, do research, and improve time management.

In July, users of OpenAI's latest model, GPT-4, started complaining that the chatbot's performance had declined.

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