Print desk·2026-08-19·.md
OpenAI vs xAI: different books, same decade
API usage first. ChatGPT subscriptions second. Enterprise seats on top of both. Grok and the API, with distribution through X. Compute is the constraint.
OpenAI leads on API usage (45%). xAI leads on Grok / API (55%). The seat follows the slice that pays.
The mix
Hover a slice
- API usage45%—
- ChatGPT35%—
- Enterprise / reserved15%—
- Other5%15%
- Grok / API—55%
- X distribution—30%
- OpenAIxAI
API usage first. ChatGPT subscriptions second. Enterprise seats on top of both.
Pays: Developers on the API. Consumers on ChatGPT. Enterprises on reserved capacity.
Builds: Research and applied engineering. The product is the model and the surface on it.
Grok and the API, with distribution through X. Compute is the constraint.
Pays: X Premium, API callers, and anyone who wants Grok inside a product.
Builds: Research, infra, and the people who put Grok on X.
The seat
Do not treat OpenAI and xAI as one market. Research and applied engineering. The product is the model and the surface on it. That is not Research, infra, and the people who put Grok on X. Name the book before the interview.