Phase 16 · AI APIs & Cloud AI Platforms
TopicsOpenAI API
Part of the AI Engineer Roadmap.
Summary
The API powering GPT models — one of the most widely integrated LLM APIs, with chat completions, function calling, embeddings and structured outputs.
How to Learn This
- 1Work through OpenAI's API quickstart and make calls for chat, embeddings and function calling.
- 2Learn the request/response structure and how message roles (system/user/assistant) work.
- 3Track token usage per request to understand cost implications early.
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