OpenAI’s flagship AI chatbot, ChatGPT, returned to solid growth in the latter half of 2024, according to a new report published on Thursday by VC firm Andreessen Horowitz (a16z). While it took ChatGPT nine months to grow from 100 million weekly active users in November 2023 to 200 million in August 2024, it’s now taken less than six months for the app to double those numbers yet again, the report found.
Shortly after its November 2022 release as a research preview, ChatGPT became the fastest app ever to reach 100 million monthly active users — a milestone it hit in only two months’ time.
By November 2023, ChatGPT had reached another milestone of 100 million weekly active users, which grew to 300 million by December 2024, then 400 million in February 2025.
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