I have noticed that if I don't call my squad for some time, often the first time I call, it fails. Does not transfer to other squad assistants. But once I have spoken with the other squad assistants, everything works flawlessly. It's like the agents are sleeping and need to be woken, or warmed up to work. What do you suggest to do in this situation?

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If I send a "Keep Alive" ping to an assistant, what will it cost? I have a squad that I want to keep warm - and it seems that I could send a ping once an hour... But what will it cost to do so? Problem is, I am testing a saas, and need assistants "ready" to respond

Sending a "Keep Alive" ping to an assistant typically incurs a small cost per ping, but the exact amount can vary based on your plan. If you're pinging once an hour, that would be 24 pings a day. I recommend checking your plan details for specific cost information. Let me know if you need help with anything else.

What are the pros/cons of using workflows vs squads for routing user questions ?

workflows are more strict and slightly less customizable, whereas squads are more freeform and can transfer seamlessly between several assistants with different configurations. you might see more updates to squads in the upcoming month ;)

VAPI is suggesting to use Squads over Workflows. See Overview page for Workflows in documentation.