OpenAI has moved fast. What began as a cautious test of clearly labeled sponsored links at the bottom of ChatGPT responses has now become a full push into measurable, outcome-based advertising. The company confirmed this week it will roll out conversion-optimized campaigns in early June. Advertisers who configure tracking by June 1 gain early access days later. The shift from impressions to outcomes This marks a decisive step. OpenAI first announced advertising plans in January 2026. Tests launched in February for logged-in U.S. adults on free and Go tiers. Higher tiers stayed ad-free. Answers remained untouched. Conversations stayed private. ( OpenAI, February 2026 ) Expansion followed. By May the pilot reached the U.K., Japan, South Korea, Brazil and Mexico. Self-serve tools appeared. Then came the real change. On May 5 OpenAI introduced cost-per-click bidding alongside existing CPM options. It also launched Conversions API and pixel-based tracking.…