Gemini 3 Effect: There Is a Drop in ChatGPT Traffic

Change in AI Traffic Data

According to current data shared by Similarweb, a traffic decline was observed in OpenAI’s ChatGPT service after November, when Google launched its Gemini 3 model. Looking at December data, Gemini traffic increased by 28 percent compared to the previous month, while ChatGPT traffic decreased by 5.6 percent.

Despite this decline, ChatGPT continues to clearly maintain market leadership with 5.5 billion monthly visitors. In the same period, Gemini reached 1.7 billion visitors. It should be noted that the analyzed data covers only website visits and does not include API integrations or mobile app usage.

Status of Rivals and Growth Rates

On an annual basis, both platforms recorded positive growth. While ChatGPT traffic increased by 49.5 percent year over year, Gemini drew attention with an aggressive growth rate of 563.6 percent. The current visitor data of other players in the sector is as follows:

• ChatGPT: 5.5 billion visitors
• Gemini: 1.7 billion visitors
• Others (DeepSeek, Grok, Claude, Perplexity): Fewer than 400 million visitors per platform

This data constitutes a concrete indicator of the prioritization strategies that came onto the agenda within OpenAI after the Gemini 3 launch and of the change in market dynamics. Competition in the sector continues to be shaped not only by the technical capabilities of models but also by user retention rates.