Gemini Embedding 2 and Mistral Embed 2312 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.
Mistral Embed 2312, from Mistral AI, has a 8,192-token context window and is priced at $0.10/M tokens on OpenRouter.