Infrastructure

API

Also known as: apis

In one line

A doorway that lets one piece of software talk to another — how apps call AI models.

What does API mean?

An Application Programming Interface (API) exposes model capabilities over HTTPS. Send a JSON request with your prompt, get a JSON response back.

Calling `POST https://api.openai.com/v1/chat/completions` to get a GPT reply inside your own app.

A neural network trained on huge text collections to predict the next word — the engine behind ChatGPT, Claude and Gemini.

The act of running a trained model to get an answer — as opposed to training it.