Ad-supported AI models can cover compute costs with one search ad every 39 minutes or one content ad every 3 minutes, making ad-only funding viable for open models.

A B200 GPU costs $4.50/hour on spot markets. At Google Search ad rates of $38.40 CPM (cost per thousand impressions), a cluster of 4 B200 Blackwells serving 300 users requires roughly 469 impressions per hour to break even—equivalent to one search ad every ~39 minutes.

Content network ads at $3.12 CPM require ~5,769 impressions per hour, or one ad every ~3 minutes. Even at a reduced effective CPM of $1.50 (accounting for fill rates and revenue share), the frequency doubles to one ad every 90 seconds—still below the ~one ad per minute that hyper-casual mobile games show.

For heavier workloads like agentic coding (which burns 10 to 20x more tokens than passive chat), a hybrid model works: $10/month plus 8 ads per day covers 2 million tokens.