Mistral Embed 2312 and Text Embedding 3 Small 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.
Text Embedding 3 Small, from OpenAI, has a 8,192-token context window and is priced at $0.02/M tokens on OpenRouter.