ChatGPT reaches 400 million weekly active users

It turns out that OpenAI's AI chat service 'ChatGPT' has more than 400 million active users per week. As of December 2024, it was 300 million per week, a sharp increase over the past few months.
ChatGPT now has 400 million weekly users — and lots of competition
OpenAI's weekly active users surpass 400 million | Reuters
https://www.reuters.com/technology/artificial-intelligence/openais-weekly-active-users-surpass-400-million-2025-02-20/
ChatGPT is an AI chat service that began testing in December 2022. Since then, the number of users has increased to 1 million in one week due to the use of a language model that was evaluated as 'too highly accurate. ' The number of users has continued to grow steadily since then, and in February 2023, about a year after the service started, the number of monthly active users reached 100 million.
ChatGPT reports that it has achieved 100 million monthly users in just two months, the fastest growth in history - GIGAZINE

By August 2024, the number of weekly active users had reached 200 million.
ChatGPT's weekly active users have doubled from the previous year to 200 million, and 92% of Fortune 500 companies are using OpenAI products - GIGAZINE

In February 2025, the number of weekly active users finally exceeded 400 million.
Marketplace.org, a market news site, noted that 'this growth is due to the heated chatbot race, with Chinese company DeepSeek releasing a model that is said to be 'highly capable and much cheaper to build.'
Marketplace.org mentioned the inference model 'DeepSeek-R1.' This model attracted attention because it was more powerful than competing models, cheaper to build than competing models, and was open source. Many consumers began downloading DeepSeek's chat app to try out the model.
Chinese AI development company 'DeepSeek' is rapidly emerging as a hot topic in the technology industry, and has also ranked first in the App Store's free app rankings - GIGAZINE

Shortly after DeepSeek-R1, OpenAI released the inference model ' o3-mini ', followed by Elon Musk's AI company 'xAI' releasing the latest version of its chat service capable of inference, ' Grok-3 ', and competition among companies is intensifying.
Regarding the current situation where each company is competing for a share of the AI market, technology analyst Eric Sfert pointed out that 'the problem is that consumers will search for which model or app is right for them and then move on,' suggesting that each company needs something to keep users.
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