For small compact implementations , Microsoft E5 is the best for Arabic . here is my recent research paper on the Topic : Semantic Embeddings for Arabic Retrieval Augmented Generation (ARAG)
However recently I am doing a project with the new Openai ada3-small and ada3-large , producing very impressive results for Arabic https://thesai.org/Publications/ViewPaper?Volume=14&Issue=11&Code=IJACSA&SerialNo=135
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