Claude's Rapid Growth: Why OpenAI Isn't Losing

Anthropic's Claude is experiencing rapid growth, with its website traffic jumping roughly 770% between September 2024 and March 2026. This is about nine times faster than ChatGPT's growth of 84% during the same period. Here's the thing: this growth isn't coming at OpenAI's expense. New data shows that most Claude users also use ChatGPT in the same month. Only a small percentage of ChatGPT users also visit Claude. What this suggests is that many users are adding Claude alongside ChatGPT, not replacing it. ChatGPT still has an estimated 1 billion monthly active users, while Claude has about 56 million. OpenAI maintains a commanding lead in scale. The bottom line is that the AI market is becoming more competitive, but it's not a winner-takes-all scenario. This means consumers are likely to have more choices and specialized AI tools available to them.