Gemini Embedding 001 and Text Embedding Ada 002 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.
Text Embedding Ada 002, from OpenAI, has a 8,192-token context window and is priced at $0.10/M tokens on OpenRouter.