Gemini Embedding 001 and GTE-Base are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Gemini Embedding 001, from Google, has a 20,000-token context window and is priced at $0.15/M tokens on OpenRouter.
GTE-Base, from thenlper, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.