If you type the following into Microsoft Word:

> In this post, we will show how to run the latest frontier-class model - Muse Spark Open, with nearly a trillion parameters - right from your desk, using the latest version of MLX, released today.

You will get

> In this post, we will show how to run the latest frontier-class model – Muse Spark Open, with nearly a trillion parameters – right from your desk, using the latest version of MLX, released today.

Not everything with em dashes is the product of generative AI... some of it is the word processor correctly following the rules of grammar and punctuation.