Ask HN: Best AI API's for Developers?

Hey folks, like many of you I'm a bit mind-blown at how AI has exploded in the last few months, and as a developer I'm keen to stay up to date on what the best developer tools/packages and API's are (whether open or closed source).

I'll start with an obvious one:

# Stable Diffusion (open source)

Stable Diffusion is a machine learning, text-to-image model to generate digital images from natural language descriptions.

https://replicate.com/blog/run-stable-diffusion-with-an-api