Qwen3-Reranker-8B

GGUF conversion of Qwen/Qwen3-Reranker-8B for dedicated query/document reranking, not text generation or general-purpose embedding vectors. Available files:

  • Qwen3-Reranker-8B-BF16.gguf
  • Qwen3-Reranker-8B-Q8_0.gguf
  • Qwen3-Reranker-8B-Q4_K_M.gguf

Run with llama.cpp

Use a recent llama.cpp build with Qwen3 reranker conversion and server support:

llama-server -hf gorse-io/Qwen3-Reranker-8B-GGUF:Q8_0 \
    --embedding --reranking --pooling rank --host 127.0.0.1 --port 8080

For the 4-bit variant, use -hf gorse-io/Qwen3-Reranker-8B-GGUF:Q4_K_M in the same command. For a local file, replace -hf ... with -m Qwen3-Reranker-8B-Q8_0.gguf or -m Qwen3-Reranker-8B-Q4_K_M.gguf. The conversion pipeline builds llama-quantize, not llama-server; build or install the server separately.

curl http://127.0.0.1:8080/v1/rerank \
    -H 'Content-Type: application/json' \
    -d '{"query":"What is the capital of China?","documents":["Beijing is the capital of China.","Paris is the capital of France."],"top_n":2}'

/reranking, /rerank, and /v1/reranking are aliases. The endpoint scores query/document pairs; it is not a chat-completions endpoint. See the llama.cpp server documentation.

Conversion notes

Keep the original downloaded source README.md alongside the weights and configuration. llama.cpp detects Qwen3 rerankers using the source directory name or original README, emits RANK pooling, and extracts the yes/no rows into cls.output.weight. The pipeline's temporary directory names use underscores, so preserving the upstream README matters. Do not replace it with this output model card before conversion, especially when using a local source directory.

CPU conversion is supported, but budget RAM for conversion/quantization and disk for the source weights, Hugging Face cache, and BF16, Q8_0, and Q4_K_M outputs. The larger models need substantially more memory and storage; --keep retains the downloads and all three output files.

This model is converted using https://github.com/gorse-cloud/convert.

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