Meta is the latest company to hit one billion users for its AI tools. During Meta's annual shareholder meeting, as reported by CNBC, CEO Mark Zuckerberg said there are over a billion monthly active users of the AI platform across its family of apps.Meta AI is directly built into Facebook, Instagram, Messenger, and WhatsApp. It’s unclear what Zuckerberg means by an active user; it may be someone who directly interacts with the Meta AI chatbot, or it could be someone who has used smaller AI tools elsewhere in applications. However, it's kind of hard to avoid if you want to search for anything on a Meta app.OpenAI’s ChatGPT is thought to be the world's biggest AI platform. In April, CEO Sam Altman suggested it has over a billion weekly users, thanks in part to the popularity of its image generator.At last week I/O 2025, Google's CEO said its Gemini platform has 400 million monthly active users. It’s unclear what counts as an active user in Google's reporting; Gemini is built into many Google applications used by millions around the world.Recommended by Our EditorsSo, this latest announcement from Meta suggests it may be the second most popular AI chatbot. With the company choosing to share monthly data rather than weekly, it's tough to know for certain how big it is compared to the competition.According to CNBC, Zuckerberg wants to increase usage further. He told shareholders, “It may seem kind of funny that a billion monthly actives doesn’t seem like it’s at scale for us, but that’s where we’re at.” He also shared that the company eventually plans to offer a premium subscription service for tasks that need more computing power. The company is also investigating how to insert paid recommendations into the chatbot.Meta revealed a standalone AI app in April, allowing you to interact with its chatbot outside of other products for the first time. #meta #hits #big #milestone #but