Gemini Embedding 2 Preview and bge-base-en-v1.5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Gemini Embedding 2 Preview, from Google, has a 8,192-token context window and is priced at $0.20/M tokens on OpenRouter.
bge-base-en-v1.5, from baai, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.