---
license: apache-2.0
base_model: Qwen/Qwen3-Reranker-8B
library_name: transformers
pipeline_tag: text-classification
language:
- en
- zh
tags:
- zen
- zen-reranker
- zenlm
- hanzo
- reranker
- retrieval
---

# Zen Reranker 8B

8B-parameter cross-encoder reranker for retrieval pipelines and search relevance — re-scores candidate passages for RAG and search quality. Part of the Zen reranker line.

Repackaged from [Qwen/Qwen3-Reranker-8B](https://huggingface.co/Qwen/Qwen3-Reranker-8B) (apache-2.0, Alibaba Qwen). Native HuggingFace `safetensors`, re-hosted under the Zen reranker line. **Not trained from scratch** — a permissively-licensed redistribution for the OSS-clean Zen model line.

## Usage

Score query/passage pairs following the upstream [Qwen/Qwen3-Reranker-8B](https://huggingface.co/Qwen/Qwen3-Reranker-8B) recipe (yes/no token scoring).

Hosted via the Hanzo gateway (`api.hanzo.ai`) as `zen-reranker-8b`. GGUF build for CPU inference: [zenlm/zen-reranker-8B-GGUF](https://huggingface.co/zenlm/zen-reranker-8B-GGUF).

## License

`apache-2.0`. Upstream: **Qwen/Qwen3-Reranker-8B** by Alibaba Qwen. This repository redistributes the weights under the same license.