Advertisers Struggle to Spend on ChatGPT Ads Due to Limited Inventory

OpenAI's push into advertising exposes a familiar tension as demand outpaces supply.

Apr. 20, 2026 at 4:03am

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OpenAI's ChatGPT ad pilot has shown strong engagement and quality signals, sometimes even rivaling brand search. However, advertisers are struggling to spend their committed budgets due to the limited inventory available on the platform. Agencies involved in the beta note that while some advertisers committed $200,000, they've barely spent $2,000 due to the small pool of ad inventory. The report suggests that ChatGPT will need more time before its ad revenue scales up to billions of dollars per year.

Why it matters

This story highlights the challenges that emerging AI-powered platforms like ChatGPT face in building out a viable advertising business. While there is strong advertiser interest, the limited inventory available is preventing them from fully utilizing their ad budgets. This tension between supply and demand is a familiar one in the advertising industry, and it will be crucial for OpenAI to address this issue as it looks to monetize ChatGPT through advertising.

The details

The ChatGPT ad pilot has shown promising results, with agencies reporting strong engagement and quality signals that sometimes rival brand search. However, the limited inventory available is preventing advertisers from fully spending their committed budgets. For instance, while some advertisers committed $200,000, they've barely spent $2,000 due to the small pool of ad inventory. The report suggests that ChatGPT will need more time before its ad revenue scales up to billions of dollars per year, as the platform needs to build out its advertising capabilities to meet the growing demand from advertisers.

  • The ChatGPT ad pilot is currently in its early stages.

The players

OpenAI

An artificial intelligence research company that has developed the popular ChatGPT language model, which is now being used for advertising purposes.

Unnamed agency executive

An agency executive involved in the ChatGPT ads beta who commented on the limited inventory and scaling challenges facing the platform.

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What they’re saying

“ChatGPT is going to need a little bit more time before revenue scales up to billions of dollars per year.”

— Unnamed agency executive

The takeaway

This story highlights the challenges that emerging AI-powered platforms like ChatGPT face in building out a viable advertising business. While there is strong advertiser interest, the limited inventory available is preventing them from fully utilizing their ad budgets. OpenAI will need to address this issue and continue to develop its advertising capabilities to meet the growing demand from advertisers.