Olmo 3.1 32B Think 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.
Olmo 3.1 32B Think, from Ai2, has a 65,536-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.