OpenAI says ChatGPT search volume has reached about one-fifth of Google’s

OpenAI’s claim rests on a comparison of query volume rather than market share. The company has not officially stated a “20% search market share,” a figure that emerged from media interpretation of its data. Third-party data shows ChatGPT processes approximately 2.5 billion prompts per day as of mid-2025, which works out to about 18% of Google’s daily search queries based on January 2025 estimates.

The definition of a “search” drives the variance in estimates. A user asking ChatGPT to rewrite a cover letter generates a prompt but is not performing a query Google would count. When analysts isolate only search-like activity, the share shrinks. Estimates range from 7.5% according to seoClarity in October 2026 to around 12% according to Ahrefs in February 2026.

OpenAI’s own Signals v3.0 report, covering July through September 2026, provides context. The company classified roughly 20.1% of messages as “seeking information.” About one in five conversations with ChatGPT looks like something a person might otherwise have typed into a search bar, while the remaining four are used for writing, coding, brainstorming, or chatting.

The scale of the user base makes even that fraction significant. OpenAI’s services reached 1.2 billion weekly users by late September 2026. This user base provides the volume that OpenAI highlights, even as the nature of the interactions varies widely.

Google still owns the clicks

Volume is one scoreboard, but referral traffic is another. On that metric, Google maintains a dominant position. Google sends about 190 times more traffic to websites than ChatGPT does. ChatGPT’s click-through rate sits below 1%, and its referrals account for less than 1% of organic sessions across various analyses.

This structural difference highlights the divergent models of the two products. Google’s classic model directs users to external websites, while ChatGPT’s model attempts to answer questions directly within the interface. For publishers and businesses that depend on search referrals, a ChatGPT session that resolves a question without a single click may count as a “search” for volume purposes while doing nothing for the website that supplied the underlying information.

A measurement fight is also brewing. The gap between the 7.5% and roughly 20% figures depends almost entirely on what counts as a search. OpenAI benefits from the broadest framing, which makes ChatGPT appear as a peer to Google. Google benefits from the narrowest definition, which keeps attention on its overwhelming lead in clicks and referrals.