zenlm/zen-reranker-4B

Zen Reranker 4B

4B-parameter cross-encoder reranker for retrieval pipelines and search relevance. Part of the Zen reranker family.

Hosted via Hanzo gateway

Served at api.hanzo.ai as zen-reranker-4b.

Files

Native HuggingFace safetensors weights, loadable directly with transformers:

from transformers import AutoModel, AutoTokenizer
m = AutoModel.from_pretrained("zenlm/zen-reranker-4B")
t = AutoTokenizer.from_pretrained("zenlm/zen-reranker-4B")

For GGUF / Ollama deployment, see zenlm/zen-reranker-4B-GGUF.

Acknowledgements

Built on Qwen/Qwen3-Reranker-4B (Apache-2.0). Mirrored here as the canonical Zen reranker family entry.