ChatGPT, the flagship generative AI product from OpenAI, is exhibiting indicators of slowing momentum as Google’s Gemini continues to slender the hole, in keeping with recent site visitors and market-share knowledge from Similarweb.

Information reviewed by Similarweb exhibits that ChatGPT’s common day by day visits have fallen sharply over the previous six weeks. Site visitors declined by about 22%, with the seven-day common dropping from roughly 203 million visits to round 158 million by early January. Over the identical interval, Google’s Gemini held regular, recording about 55-60 million day by day visits.

The shift has translated right into a measurable change in market share. ChatGPT’s share of the worldwide generative AI market stood at about 64.5% as of January 2, 2026, down from round 68% in December 2025 and sharply decrease than its 86% share a 12 months in the past in January 2025. Gemini, in the meantime, has expanded its footprint considerably, rising from 5.7% a 12 months in the past to roughly 21.5% now.

Different platforms stay smaller however are gaining traction. Grok has crossed the three% market share mark and is closing in on DeepSeek, which stands at about 3.7%. Perplexity and Claude are every holding regular at round 2%, whereas Microsoft’s Copilot trails at roughly 1.1% in January 2026, exhibiting little change over the previous 12 months.

Whereas ChatGPT continues to steer in total site visitors, the info suggests its development curve has flattened. Similarweb estimates that Gemini cannibalised round 31-33% of ChatGPT’s site visitors in early December, with that determine rising to just about 39-40% by the tip of the month.

Consumer behaviour additionally differs between the 2 platforms. Gemini seems to draw fewer customers, however engagement ranges are increased. Common session period on Gemini stands at 7 minutes and 20 seconds, in contrast with 6 minutes and 32 seconds on ChatGPT. Web page views per go to are additionally increased on Gemini, at 4.3 pages, versus 3.8 on ChatGPT.