MiniMax M2 and Riverflow V2 Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
MiniMax M2, from MiniMax, has a 204,800-token context window and is priced at $0.255/M tokens input, $1.02/M tokens output on OpenRouter.
Riverflow V2 Pro, from Sourceful, has a 8,192-token context window and is priced from $0.15/image on OpenRouter.