BILLIONS The man who helped OpenAI to go from millions to billions in revenue - Zack Kass [Open AI]
Mar 6, 2026
Zack Kass, former Head of Go-To-Market at OpenAI who helped commercialize GPT models and forge enterprise deals, including with Microsoft. He recounts selling nascent AI to skeptical Fortune 500s. He explains why ChatGPT’s chat interface clicked, the lightning growth and scaling scramble that followed, his burnout and exit, and big-picture ideas about AI, geopolitics, and education.
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First Salesperson Watch: GPT-3 Wrappers Won Early
- Zack Kass joined OpenAI as its first salesperson and watched early customers build 'wrappers' that arbitraged GPT-3 while OpenAI captured little revenue.
- He describes GPT-3 era winners like Jasper who marketed clean products over messy API complexity, selling 'magic' by picking the right model and quality control.
Chat Interface Transformed API Abstraction Into Tangible Value
- Chat interface was chosen to let people see, feel, and touch the models because the API was too abstract for most users.
- ChatGPT launched as a research preview to drive API adoption by demonstrating value through dialogue, not docs.
Lightning In A Bottle Beat Traditional Distribution Playbooks
- ChatGPT's viral growth was pure product-market fit and word-of-mouth, not engineered distribution or built-in virality mechanics.
- The web app had no instructions, frequent rate limits and crashes, yet exploded because GB 3.5 was simply ready for mass use.
