The chatGPT site had over 3B visits last month (#11 in Worldwide Traffic). Gemini and Character AI get a few hundred million but Claude doesn't even register in comparison. [0]
Last they reported, OpenAI said they had 200M weekly active users.[1] Anthropic doesn't have anything approaching that.
[0] https://www.similarweb.com/blog/insights/ai-news/chatgpt-top...
[1] https://www.reuters.com/technology/artificial-intelligence/o...