ChatGPT’s Free Ride Is Over — Here’s the Bill

Every time you ask ChatGPT a question, it costs about a third of a cent to answer. Multiply that by a trillion queries a year, and you’re looking at $3 billion in electricity costs alone before salaries, data centers, or research.

That math is why ads are now showing up in ChatGPT.

After testing ads with select US users, ads for free and Go-tier users in the US will roll out in the coming weeks. They appear at the bottom of answers when there’s a “relevant sponsored product or service.” Plus, Pro, Business, and Enterprise users won’t see them for now. To power the rollout, OpenAI partnered with Criteo, the ad-tech firm responsible for those shoe ads that follow you around the internet for two weeks after one Google search.

The math behind ChatGPT’s rising costs

Here’s why the economics made this inevitable:

• ChatGPT has 900 million weekly active users, but only 50 million are paying.
• Running the platform costs roughly $17 billion a year.
• Revenue hit $20+ in 2025, growing 10x since 2023, and still doesn’t cover costs if infrastructure costs are included.

OpenAI CFO Sarah Friar addressed this directly in the past. The business model has to “scale with the value intelligence delivers.” Subscriptions cover power users. The API covers developers. Ads, she wrote, follow the same logic. As people make decisions, ads should present relevant options, provided those options offer real value.

COO Brad Lightcap called the rollout “an iterative process” when they initially tested ads. OpenAI says ads won’t influence ChatGPT’s answers, won’t share your conversations with advertisers, and will stay off sensitive topics like health and politics. Users under 18 are exempt.

How OpenAI plans to monetize ads at scale

Early advertiser commitments give a sense of the scale OpenAI is targeting.

Various sources report that OpenAI is charging a reported $60 per 1,000 impressions, an unusually high rate, with a $200K minimum commitment. Shopify is already letting merchants advertise through its Shop Campaigns network, alongside early testers like Target, Williams Sonoma, and Adobe.

The free tier built ChatGPT’s 900 million users. Ads are how OpenAI pays for them.

Indeed, there’s no such thing as a free lunch. Every query costs something. Someone has to pay for it. With ChatGPT Free, users don’t pay a dime per query; OpenAI shoulders the cost. Now the bill’s arrived, and it comes in the form of ads.

Editor’s note: This content originally ran in the newsletter of our sister publication, The Neuron. To read more from The Neuron, sign up for its newsletter here.