2.5 Pro supports prompt caching now: https://cloud.google.com/vertex-ai/generative-ai/docs/models...

Oh, that must’ve been in the last few days. Weird that it’s only in 2.5 Pro preview but at least they’re headed in the right direction.

Now they just need a decent usage dashboard that doesn’t take a day to populate or require additional GCP monitoring services to break out the model usage.