Mistral Embed 2312 and Gemini Embedding 001 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Mistral Embed 2312, from Mistral AI, has a 8,192-token context window and is priced at $0.10/M tokens on OpenRouter.
Gemini Embedding 001, from Google, has a 20,000-token context window and is priced at $0.15/M tokens on OpenRouter.