Text Embedding 3 Small and multi-qa-mpnet-base-dot-v1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Text Embedding 3 Small, from OpenAI, has a 8,192-token context window and is priced at $0.02/M tokens on OpenRouter.
multi-qa-mpnet-base-dot-v1, from sentence-transformers, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.