AI API

An AI API exposes a model to software. Answers via API can differ from the consumer chat UI.

If you measure GEO on the API and the CEO uses the app, you will fight. See UI vs API tracking.

APIs also lack ads, memory, and browsing unless you wire them.

Examples

A vendor demo uses gpt-4.1 with browsing off. Customers use ChatGPT with memory on. Different universe.

ChatGPT is OpenAI’s consumer assistant. For GEO, it is both a memory of the web and, with Search, a live retrieval product.

Measuring model quality on tasks. Internal evals for your GEO classifier are useful. Public leaderboards are weakly related to citations.

Chat answers in the app can differ from API completions: tools, memory, browsing, safety, ads.

Which should I track? +

The surface your buyers use. If that is the consumer app, don’t only hit the API.

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