An API is a connection point between programs
API stands for Application Programming Interface. It defines how one program can request a function or data from another. A restaurant analogy is useful: the customer is your application, the kitchen is the service, and the API is the ordering system between them.
What does API mean in AI news?
When an AI company says a model is available through an API, developers can call that model from their own applications and tools. OpenAI and Anthropic both provide model APIs, and many products that appear to have their own AI use one of these services behind the scenes.
An API key is a credential
Many APIs require an API key, a secret string associated with an account or project. Someone who obtains the key may be able to use the service and create charges. Do not paste it into public code, a shared document, or an ordinary chat.
Chat products and APIs have different terms
- Pricing: Chat products often use monthly plans, while APIs commonly charge by token or request
- Interface: A person uses a chat screen; software sends structured API requests
- Purpose: APIs fit automation, high-volume processing, and features embedded in another product
No-code automation tools also make APIs accessible without traditional programming. The same underlying model can have different pricing, limits, and data-handling terms in the chat product and the API.