# Qwen3 Reranker 8B

Qwen3 Reranker 8B is Alibaba's model for scoring how well a document answers a query. It reorders candidate documents by relevance to refine search results and select context for retrieval-augmented generation. Its published context window is 40,960 tokens. The advertised input rate is $0.20 per million input tokens.

- Model identifier: ` qwen/qwen3-reranker-8b `
- Creator: Qwen
- Providers: Fireworks
- Model type: Reranking
- Canonical model page: [Qwen3 Reranker 8B](<https://impossibl.com/qwen/qwen3-reranker-8b>)
- API availability: Listed as serving through Impossibl.

## Providers

Fireworks hosts Qwen3 Reranker 8B. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

| Provider | Endpoint location | Routes | Verified context window | Tool calling |
| --- | --- | --- | --- | --- |
| Fireworks | Not specified | 1 | Not verified | Not supported |

The model price applies whichever provider serves the request. Endpoint locations do not guarantee inference residency.

## Specs and Capabilities

- Context window: 40,960 tokens
- Maximum output tokens: Not published in the public catalog; this is separate from the context window.
- Inputs: text
- Outputs: ranked relevance scores
- Tool calling: Not supported

## API access

Use ` qwen/qwen3-reranker-8b ` as the model identifier through the Impossibl API.

Published API endpoints:

- ` /v1/rerank `

[API quickstart](<https://impossibl.com/docs/agent-quickstart>) · [Models and billing documentation](<https://impossibl.com/docs/models>)

## Published API prices

All rates are in USD. An unpublished rate is unknown, not zero. Workspace-specific pricing, taxes, balance-purchase fees, billing adjustments, and tool charges can affect the amount paid.

| Usage | Published base rate | Billing unit |
| --- | --- | --- |
| Input | $0.20 | per million input tokens |
| Output | $0.00 | per million output tokens |
| Cache read | Not published | per million cached input tokens |
| Cache write (default retention) | Not published | per million tokens |
| Cache write (one-hour retention) | Not published | per million tokens |
| Audio input | Not published | per million audio input tokens |

## Availability and retirement

The model is listed as serving. No retirement is announced in the current public catalog.

## Frequently asked questions

### What is Qwen3 Reranker 8B?

Qwen3 Reranker 8B is Alibaba's model for scoring how well a document answers a query. It reorders candidate documents by relevance to refine search results and select context for retrieval-augmented generation.

Sources: [Fireworks model documentation](<https://fireworks.ai/models/fireworks/qwen3-reranker-8b>); [OpenRouter model listing](<https://openrouter.ai/qwen/qwen3-reranker-8b>)

### How much does Qwen3 Reranker 8B cost?

Qwen3 Reranker 8B costs $0.20 per million input tokens through the Impossibl API. All rates are in USD.

### What is the context length of Qwen3 Reranker 8B?

Qwen3 Reranker 8B has a 40,960-token context window through the Impossibl API.

### Does Qwen3 Reranker 8B support tool calling?

No. Qwen3 Reranker 8B does not support tool calling through the Impossibl API.

### What inputs and outputs does Qwen3 Reranker 8B support?

Qwen3 Reranker 8B accepts text as input. Qwen3 Reranker 8B returns ranked relevance scores.

### How do I use Qwen3 Reranker 8B through an API?

Qwen3 Reranker 8B is available through the Impossibl API. Use qwen/qwen3-reranker-8b as the model identifier with /v1/rerank. The quickstart explains how to create an API key and send your first request.

## Sources and related links

Prices, limits, capabilities, endpoints, and availability come from the public Impossibl catalog. Creator documentation supplies descriptions and release dates where available; it does not override the published API offering.

- [Public Impossibl model catalog](<https://api.impossibl.com/v1/models>)
- [Full model directory as JSON](<https://impossibl.com/models.json>)
- [Qwen3 Reranker 8B: model details and pricing](<https://impossibl.com/qwen/qwen3-reranker-8b>)
- [Model directory](<https://impossibl.com/models>)
- [Fireworks model documentation](<https://fireworks.ai/models/fireworks/qwen3-reranker-8b>)
- [OpenRouter model listing](<https://openrouter.ai/qwen/qwen3-reranker-8b>)