Gemini Embedding 2 and GTE-Large are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Gemini Embedding 2, from Google, has a 8,192-token context window and is priced at $0.20/M tokens on OpenRouter.
GTE-Large, from thenlper, has a 512-token context window and is priced at $0.01/M tokens on OpenRouter.