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Causal Gemma3-1B turned into a strong bidirectional embedder via masking-then-contrastive adaptation.
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The Gemma3-1B-based member of the BidirLM family, converted from a causal decoder into a bidirectional encoder via the BidirLM Bi+MNTP+Contrastive recipe trained on a multilingual multi-domain corpus. Positioned as a competitive open-data alternative to EuroBERT-610m and Qwen3-Embedding-0.6B at the ~1B scale.
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