KAT-Coder-Pro V1 and Riverflow V2 Max Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
KAT-Coder-Pro V1, from kwaipilot, has a 262,144-token context window and is priced by the provider serving it on OpenRouter.
Riverflow V2 Max Preview, from Sourceful, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.