AI news story

ChatGPT still leads the chatbot market but its dominance is slipping as Google's Gemini gains ground

ChatGPT continues to dominate the chatbot market, but its lead is shrinking. According to new Similarweb figures, OpenAI's c…

  • LLMs
  • Source: The Decoder
  • Published: 2026-03-12

Editor's take

OpenAI's ChatGPT has seen a significant decline in its market share within the chatbot landscape over the past year, ceding ground to Google's Gemini. This shift underscores the accelerating competition in the foundational LLM space, impacting not only the direct users of these chatbots but also the developers and enterprises building on top of them. ChatGPT's initial surge created a powerful network effect, but Gemini's growing presence, likely fueled by Google's vast ecosystem and data, signals a more diversified competitive environment.

The continued erosion of ChatGPT's dominance raises questions about OpenAI's ability to maintain its innovation lead and customer loyalty against a well-resourced competitor. The key metrics to monitor will be Gemini's ongoing market share gains, the specific use cases where it's gaining traction, and whether other players like Anthropic's Claude or Meta's Llama can carve out significant niches. A sustained decline for OpenAI, beyond a few percentage points, would suggest a fundamental realignment in the LLM market's power dynamics.