Google Gemini continues to take market share from ChatGPT in terms of web traffic.
The latest SimilarWeb data for March 2026 shows Gemini a significant 25.46% of generative AI web traffic — up from just 6% a year ago. ChatGPT, meanwhile, has fallen to 56.72%, a dramatic erosion from the 77.43% it held twelve months prior. The gap between the two platforms is narrowing faster than most analysts anticipated.
The trend has been building for months. Gemini crossed the 20% mark for the first time in January 2026, and has continued its climb since. In February 2026, Gemini’s year-over-year traffic grew 643% compared to just 37% for ChatGPT — a staggering gap that underscores how much momentum Google has built. Over a longer window, Gemini grew 3x faster than ChatGPT in the second half of 2025.
Meanwhile, the most striking single-month move in the March data belongs to Anthropic’s Claude, which jumped from 2.22% three months ago to 6.02% — nearly tripling its share in a quarter. Claude’s year-over-year growth of 297% through early 2026 had already signalled rising user interest, but the March surge is a notable acceleration.
DeepSeek held 3.74% in March versus Grok’s 3.44%, reversing the previous month’s order. Neither platform has managed sustained momentum — both have oscillated in the 3–4% band for several months. Copilot’s share ticked up to 1.99%, partly due to SimilarWeb adding Microsoft’s m365.cloud.microsoft/chat to its tracking. Perplexity rounds out the field at 1.64%.
Here’s how the standings have shifted over the past 12 months:
| Platform | 12 months ago | 6 months ago | 3 months ago | March 2026 |
|---|---|---|---|---|
| ChatGPT | 77.43% | 71.75% | 63.19% | 56.72% |
| Gemini | 6.00% | 13.56% | 22.59% | 25.46% |
| Claude | 1.40% | 2.26% | 2.22% | 6.02% |
| DeepSeek | 3.73% | 2.81% | 4.08% | 3.74% |
| Grok | 7.03% | 4.08% | 3.26% | 3.44% |
| Copilot | 1.38% | 2.01% | 1.80% | 1.99% |
| Perplexity | 1.66% | 2.51% | 1.86% | 1.64% |
The broader picture is one of a market that has decisively moved on from single-player dominance. A year ago, ChatGPT operated near-monopolistically with more than three-quarters of traffic. Today, it holds slightly more than half. Gemini’s rise has been powered by strong model releases, aggressive ecosystem integration, and a surge in consumer awareness — but web traffic share is not the same as engagement depth. ChatGPT still leads Gemini on monthly active users by nearly 4x, suggesting OpenAI retains a stronger hold on habitual users even as Gemini wins the new-visitor race.
The March numbers make one thing clear: the generative AI market is no longer ChatGPT’s to protect — it’s everyone else’s to take.