OpenAI just clocked the biggest loss of search market share in any month

AI giant OpenAI has experienced a significant decline in its market share, dropping from 75% in October to 61% in November 2025. The figure marks the biggest loss of search market share it has had in any month.

This is a notable decline from its previous market share, indicating increased competition from smaller players. OpenAI’s market share has been declining gradually, with several competitors like Perplexity and Claude AI gaining ground.

Despite the decrease, OpenAI continues to dominate the generative AI chatbot market, holding a significant…