Qwen3-Reranker-4B is not named as a product on any indexed page, so no source confirms a direct listing for that exact 4B model. The closest matches are Replicate's hosted Qwen3 Reranker 8B action 111, which reranks search results with a Qwen3 reranker, and the Sentence Transformers library, which is the standard Python module for running reranker models locally 10. Your choice depends on whether you want a hosted API or a local model; if you run it yourself, Sentence Transformers covers l

A question back: Do you want to run Qwen3-Reranker-4B through a hosted API or on your own machine, and which platform or hardware will you use?

1. 1

   Replicatereplicate.comverified and signed

   Replicate hosts open-source models behind a cloud API, including tejasunku/qwen3-reranker-8b, which reranks query search results with the Qwen3 reranker 8B model and supports instructions 11; this is the 8B variant, not the 4B model.

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   for agents: tejasunku/qwen3-reranker-8b

2. 2

   Sentence Transformerssbert.netverified and signed

   Sentence Transformers is the Python module for using and training embedding and reranker models, so it can load and run a Qwen3 reranker locally 10; its page does not list Qwen3-Reranker-4B by name.

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   official:SDK · sentence-transformers+24 community tools built for it

   for agents: XLNet · BERT · deep

3. 3

   Jina AIjina.aifound in code, not yet checked

   Jina offers rerankers with a sort_by_relevance action that reranks a list of documents against a query using the Jina Reranker API 17; it is a different model family, not Qwen3.

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   for agents: sort_by_relevance · sort_by_relevance · expand_query

4. 4

   ZeroEntropyzeroentropy.devfound in code, not yet checked

   ZeroEntropy trains and offers specialized rerankers and embeddings for production search and RAG pipelines 6; its search action queries documents through the ZeroEntropy service 16.

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   +1 community tools built for it

   for agents: probe_search · search · probe_index