ChatGPT と Gemini、それぞれ利用者が 10 億人突破

For the 14th time, a Google product has hit 1 billion users. Google CEO Sundar Pichai posted on X that a billion people are using Gemini every month, and that Gemini is Google’s fastest-growing product ever.

A billion users is a huge milestone, but Google isn’t the first AI app to hit it. OpenAI’s ChatGPT hit the mark a few weeks ago, though the company buried the announcement that “more than 1 billion people are putting ChatGPT to work” in an otherwise anodyne blog post about how people use AI. External data suggested ChatGPT crossed 1 billion users as early as this June, but OpenAI hadn’t announced anything until that post on August 6th. OpenAI spokesperson Lindsay McCallum says ChatGPT crossed 1 billion monthly users some time ago, and hit a billion a week in July.

The metrics, and the growth they represent, are somewhat complicated here. OpenAI said that ChatGPT had 900 million weekly active users in February of this year, and reaching 1 billion five months later represents a significant slowdown in growth for ChatGPT, which was for years touted as the fastest-growing software ever. McCallum declined to say how many monthly users ChatGPT has.

Google, meanwhile, announced in February that Gemini had 750 million monthly users, before reporting 950 million in late July on its earnings call, and Google spokesperson Alex Joseph says it reached 1 billion last week before announcing it today. (Claude appears to be growing fast, but Anthropic doesn’t disclose its user data, and estimates put its user numbers in the tens