With the recent news about the new Model concept of Meta, it would be interesting to use
GitHub - facebookresearch/SONAR: SONAR, a new multilingual and multimodal fixed-size sentence embedding space, with a full suite of speech and text encoders and decoders. as a text embedding model.
Based on my internet research, it could be a performant model for text embedding.
With such a model, RAG testing can be done as a one-stop shop in the SambaNova cloud.