Gemini Embedding 2 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 2, from Google, has a 8,192-token context window and is priced at $0.20/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.