Because they are based on [the west coast of the US](https://en.wikipedia.org/wiki/American_frontier). DeepSeek, Z.ai, Moonhsot, and Mistral are never called frontier because they aren't based in California.

Outside of California they're sparkling ai labs.

I am supposed to say we are using these sparkle models then?

So its like a prarie thing

Huh, interesting. History casts a long shadow.

It’s like “cutting edge”. A metaphor for the newest and best.