ChatGPT Market Share Falls Below 50% for the First Time – What Is Really Happening in 2026
For three and a half years, there was only one real answer to the question "which AI should I use?" ChatGPT. Obviously. It was not even a competition. OpenAI's chatbot had the brand recognition, the head start, the developer ecosystem, and a level of cultural dominance that few products in technology history have ever achieved. As recently as December 2024, ChatGPT commanded an extraordinary 65.3% of the global AI assistant market. Some industry trackers put its peak even higher, at close to 87% of all AI chatbot web traffic. That era has quietly ended. According to Sensor Tower's State of AI 2026 report, ChatGPT's share of the global AI assistant market fell to 46.4% by the end of May 2026 — the first time it has dropped below the halfway mark since the product launched in late 2022. The crossing point itself happened back in March, with the May figure representing where things settled after the threshold was crossed. This is not a small, easily dismissed statis...