OpenAI reveals ChatGPT's $1B agentic ad stack
OpenAI just pulled back the curtain on the LLM-powered ad architecture powering ChatGPT, which crossed a $1 billion annualized run rate in under 200 days. Instead of relying on traditional keyword triggers, it uses a custom post-trained LLM orchestrator running tool calls in an agentic loop across multi-turn sessions—completely isolated from organic answer generation to prevent bias.