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Business & Product Glossary

API

An Application Programming Interface that lets software talk to a service programmatically.

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In AI, an API is how applications send prompts or data to a model and receive results. Providers expose endpoints with authentication, usage limits and per-token pricing. APIs let teams build products on top of models without hosting the hardware themselves, and they are the usual way AI features are integrated into existing software.

Related terms

Function Calling

Letting a model request a specific external tool or API with structured arguments.

Inference

Running a trained model to produce an output, as opposed to training it.

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