AI

If you've already built something on the Claude API, the OpenAI API will feel familiar within about ten minutes and then throw a handful of genuinely different design choices at you. This course walks through the Chat Completions and Responses APIs, how roles and messages work, how tool calling is structured, why streaming matters more than people think, and how to keep your application portable across providers instead of welding it to one vendor's field names. It's written for developers who want the practical map, not a marketing pitch.

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