ChatGPT is used by 400 million people a week, as confirmed by OpenAI in a Reuters report. That's a shocking number, considering the AI chatbot is only a little over two years old. It makes ChatGPT one of the most widely used digital tools on the planet, putting it in the same league as search engines and social media platforms.

OpenAI now has 400 million weekly active users, up from 300 million in early December, OpenAI’s chief operating officer, Brad Lightcap, tells CNBC.

OpenAI's Brad Lighcap stated the company now has over 400 million weekly active users. That's an increase of 100 million in less than three months.