Rerankers APIs

About Rerankers on EmpirioLabs

Reranker models on EmpirioLabs score and reorder a set of candidate documents against a query, which sharpens retrieval pipelines before the results reach a language model.

Rerankers models (1)

Qwen3 Rerank

Semantic document reranker. Sorts up to 500 candidates per query by relevance, supports 100+ languages, and accepts a custom sorting instruction.

How to call Rerankers models

Qwen3 Rerank ranks candidate documents against a query through POST /v1/reranks with the model id qwen3-rerank. Swap the model id for any model above. Get an API key from the EmpirioLabs dashboard.

curl https://api.empiriolabs.ai/v1/reranks \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3-rerank",
    "query": "How do I rotate an API key?",
    "documents": ["Rotate keys from the dashboard.", "Billing is pay as you go."]
  }'

Rerankers APIs: common questions

How many Rerankers model APIs does EmpirioLabs offer?

EmpirioLabs lists 1 Rerankers model APIs, including Qwen3 Rerank. Each model has its own dedicated API page with live pricing, parameters, and a quickstart.

How are Rerankers APIs priced on EmpirioLabs?

Every Rerankers model is billed pay as you go, with no monthly minimum. The exact rate card lives on each model's page and always matches what the API charges.

Do I need to be a developer to use Rerankers models?

No. Every model here runs in the EmpirioLabs playground, a friendly in-browser interface where you can set the options and see results without writing any code. When you are ready to automate, the same model is available through the API.

Other model categories