jua 4B mixed jua 4B mixed is a Brazilian Portuguese legal embedding model based on Qwen/Qwen3 Embedding 4B . It was adapted with a mixed supervision regime that combines legal domain supervision with broader question passage supervision, and is intended for heterogeneous retrieval settings where legal specialization and broader semantic robustness are both important. This model is presented in the paper Domain Adaptive Dense Retrieval for Brazilian Legal Search . It is the mixed condition discussed in the paper. Model Overview Base model: Qwen/Qwen3 Embedding 4B Model type: text embedding Primary language: Brazilian Portuguese Intended use: dense retrieval for Brazilian legal search Training profile: mixed supervision The mixed training regime uses: JUÁ Juris training pairs Ulysses derived legislative supervision a small synthetic legislative extension based on alternative query formulations SQuAD pt as a broader question passage supervision source Intended Use This model is best suited for: heterogeneous legal retrieval question driven legal search retrieval setups that need a stronger balance between legal specialization and semantic robustness upstream retrieval for RAG like leg…
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