ChatGPT had an estimated 100 million monthly active users by January 2023.

ChatGPT reached an estimated 100 million monthly active users by January 2023, about two months after its November 30, 2022 launch, according to a UBS analysis based on Similarweb data. The figure, widely repeated by media, was an analyst estimate rather than an official OpenAI count.

ChatGPT had an estimated 100 million monthly active users by January 2023. The Claim ChatGPT reached 100 million monthly users within two months of its launch. NOT BS TOTAL BS HARDLY BS — Verdict: Mostly True Verified by Lenz · Sep 7, 2026 The Short Version The milestone is well supported as a widely accepted estimate. UBS analysis based on Similarweb data placed ChatGPT at roughly 100 million monthly active users in January 2023, about two months after its November 30, 2022 launch. However, the figure was not an official OpenAI count, and extensive media repetition largely traces back to that same underlying analysis. Caveats The 100 million figure was an analyst estimate, not an official OpenAI user count. Many reports repeat the same UBS/Similarweb analysis rather than providing independent measurements. The underlying metric was monthly active users, not necessarily 100 million registered individuals.