Text Embedding 3 Small and R1T Chimera are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Text Embedding 3 Small, from OpenAI, has a 8,192-token context window and is priced at $0.02/M tokens on OpenRouter.
R1T Chimera, from tngtech, has a 163,840-token context window and is priced by the provider serving it on OpenRouter.