ChatGPT Ads Are Expanding: What CPC Bidding Means for Advertisers in 2026

In May 2026, OpenAI expanded ChatGPT Ads from an initial pilot program to a self-serve advertising platform available to all US advertisers. The company introduced cost-per-click (CPC) bidding alongside its existing cost-per-thousand-impressions (CPM) model, providing advertisers with additional flexibility in managing their spend. However, ChatGPT Ads remain distinct from traditional search advertising due to their unique relevance controls and lack of exact-match keyword or demographic targeting.

ChatGPT Ads are displayed at the bottom of eligible conversations, clearly labeled and separate from the assistant's responses. OpenAI emphasizes that advertising cannot influence what the AI assistant tells users, setting a governance boundary that is crucial for maintaining advertiser and user trust as the platform evolves.

The rollout began as a pilot program in February 2026, with HelloFresh among the early participants. The company later introduced self-serve buying options, allowing advertisers to choose between CPC and CPM bidding models. CPC bidding allows advertisers to pay for engagement, while CPM campaigns focus on impressions. OpenAI recommends starting CPC bids between $3 and $5 per click, though actual prices may vary as the platform matures.

Advertisers will need to adapt their strategies to the context-based relevance model used by ChatGPT Ads. Instead of keyword targeting, advertisers must provide context hints at the ad-group level to guide relevance. This approach requires a new planning discipline, focusing on the situations, needs, and adjacent topics in which the advertiser's offer is relevant. Creative clarity is essential to distinguish a useful commercial proposition without relying on keyword insertion.

While OpenAI has added features such as custom audiences and conversion-optimized campaigns, the platform is still considered an evolving ecosystem. Advertisers should establish their own baselines for performance measurement, as reported CPMs have declined over time. The product's safety model ensures that advertisers cannot influence ChatGPT's responses, providing a clearer trust framework for brands operating in conversational environments.

For enterprises exploring this new advertising channel, the primary opportunity lies in understanding how brand discovery and paid reach may coexist in conversational interfaces. An early program should focus on developing context hypotheses, ensuring creative clarity, implementing conversion tracking, conducting controlled bidding tests, and conducting governance reviews to maintain brand suitability and compliance.