API (Application Programming Interface) — A set of rules that lets software applications communicate. REST APIs use HTTP requests. AI APIs let you send text and get AI-generated responses. OpenAI, Anthropic, and Google all offer AI through APIs. Pricing is typically per token or per request.
Why It Matters
Understanding API (Application Programming Interface) is essential for anyone working with AI systems. As the technology evolves, these fundamentals separate informed decisions from costly mistakes.
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