While OpenAI's ChatGPT accounted for almost half of the AI web traffic, Anthropic's Claude led in terms of the average usage time, according to The AI 'Big Bang' Study 2025.

The top 10 AI chatbots accounted for 58.8% of all AI web traffic from a market of over 10,500 AI tools generating nearly 100 billion estimated web visits based on the 12-month data from August 2024-July 2025.

ChatGPT alone commanded 48.36% market share with web visits to the AI chatbot growing 106% year-on-year to 46.6 billion. 

Notably, the next nine AI chatbots combined only make up 10.45% of the market share.

China's DeepSeek, which shook the AI industry after it launched a new AI tool in January this year, had only 2.7 billion web visits. 

After peaking at 520 million visits in February 2025, DeepSeek’s web traffic declined steadily to 314.6 million per month by July, a 39.5% drop in five months, signaling weakening momentum.

In comparison, Elon Musk's Grok grew from just 51K visits to 687 million, a staggering 1,343,408% increase year-over-year. 

"Gemini, on the other hand, shows the cleanest and steadiest growth trajectory, more than doubling from 650 million to 1.7 billion visits, largely thanks to improved Google integration and UI. Claude and Perplexity have also more than doubled their traffic, each crossing the billion mark," the study noted.

Notably, Claude maintained the highest user engagement rate, with an average session time of 16 minutes and 44 seconds.

However, ChatGPT wasn't too far behind with an average session time of 15 minutes and 25 seconds.

DeepSeek recorded an average session time of 12 minutes 54 seconds. Gemini ranked second lowest, and Microsoft Copilot registered the lowest usage duration in the study.