paraphrase-MiniLM-L6-v2 and Riverflow V2 Fast Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
paraphrase-MiniLM-L6-v2, from sentence-transformers, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.
Riverflow V2 Fast Preview, from Sourceful, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.