API vs SDK: Core Differences. You might be asking, “Well, if an SDK includes APIs, aren’t they the same?” Great question! While they’re closely related, they serve different purposes.

OpenAI's new API and Agents SDK consolidate a previously fragmented complex ecosystem into a unified, production-ready framework. For enterprise AI teams, the implications are potentially profound ...

For an SDK, in terms of software, the target may be an API, middleware, or an operating system. Of course, middleware and operating systems can have many APIs for different functional areas.

The decision to use an SDK vs API can impact the end product’s user experience, reliability, and timeline. SDKs and APIs both provide the ability to add innovative features into pre-existing apps.