OpenAI Opened ChatGPT Ads to U.S. Without a Single Measurement Partner Signed
OpenAI opened its ChatGPT ads manager to U.S. advertisers in beta on May 5, 2026, dropped the $50,000 minimum spend, and added CPC bidding to the prior CPM-only model. Cost-per-action bidding and third-party measurement are both promised but unscheduled, and OpenAI has named zero measurement vendors so far.