Mistral Embed 2312 and all-mpnet-base-v2 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Mistral Embed 2312, from Mistral AI, has a 8,192-token context window and is priced at $0.10/M tokens on OpenRouter.
all-mpnet-base-v2, from sentence-transformers, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.