Runway's flagship video model: the most film-like. By Runway, on GridPup at $0.72 per 5-second clip, paid from your GridPup balance per request. No subscription.
Runway Gen-4.5 is in the Playground now; video generation models are coming to the API later.
Questions
How much does Runway Gen-4.5 cost?
$0.72 per 5-second clip, charged per request from your prepaid balance. You need a small balance to start ($1 for most models); there is no monthly fee.
Who runs it?
Runway made Runway Gen-4.5. GridPup serves it through Cloudflare's AI Gateway, so you use it with one GridPup balance instead of an account with Runway.