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Model infoModelsSnapshot: 15 Oct 2026

ByteDance / Seed Rerank

Doubao Seed 1.6 Rerank

Multimodal relevance model for refining retrieved candidates. Knowledge-base ranking and integrated vector search have separate request limits.

availableClosed weightsReranking
Official documentation (opens in a new tab)Reviewed 15 Oct 2026
4 of 19 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingSee ratesVolcengine VikingDB Knowledge Base
Output billingSee ratesPublished units and conditions below

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected
Maximum input tokens
Not collected
Maximum output
Not collected
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
Not collected
Batch processing
Not collected
Fine-tuning
Not collected
Context caching
Not collected
Parameters
Not collected
Architecture
Not collected
Knowledge cutoff
Not collected
Release date
Not collected
Languages
Not collected
Input modalities
Text, Image, VideoSource for Input modalities (opens in a new tab)

Provider describes multimodal ranking; the standalone knowledge-base API only documents text/image fields. Video handling is integration-specific.

Output modalities
Relevance scoresSource for Output modalities (opens in a new tab)
Ranking results
One relevance score per candidate, in input order, plus total token usage.Source for Ranking results (opens in a new tab)
API model selector
doubao-seed-rerank is the documented alias of Doubao Seed 1.6 Rerank.Source for API model selector (opens in a new tab)

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Volcengine VikingDB Knowledge Base

Provider source (opens in a new tab)
API model ID
doubao-seed-rerank
Access
Signed account access required. The Go example uses api-knowledgebase.mlp.cn-beijing.volces.com. No request was executed.
Regions
cn-beijing (SDK example)
API endpoint URL
POST /api/knowledge/service/rerankSource for API endpoint URL (opens in a new tab)
Documents per ranking request
200Source for Documents per ranking request (opens in a new tab)

Length of datas, not a token-context limit.

Ranking controls
Optional rerank_instruction: at most 1,024 characters.Source for Ranking controls (opens in a new tab)
Image input limits
Public image URL or JPEG/PNG/WebP/BMP base64; each image below 3 MB; request at most 4 MB.Source for Image input limits (opens in a new tab)
Ranking results
float64 scores correspond to datas order; token_usage reports consumed tokens.Source for Ranking results (opens in a new tab)
SDK support
Go knowledge SDK uses IAM AK/SK; this interface does not support API-key authentication.Source for SDK support (opens in a new tab)
Configuration discrepancy
The model description includes video; the standalone request schema exposes text/image fields without a video field.Source for Configuration discrepancy (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 15 Oct 2026
CategoryUsageRateUnit
Knowledge-base rerankingInput tokens1CN¥0.00051K tokens

Rate conditions

  1. Shared Knowledge Base reranking tariff, not a separate Seed-version quote. Input-token usage is billed hourly in postpaid mode; compute/storage and other model calls are additional. No image/video conversion rule or vector-database/BytePlus price inferred.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

BytePlus VikingDB integrated search

Provider source (opens in a new tab)
API model ID
doubao-seed-rerank
Access
Integrated search requires an existing collection/index and signed access. The separate tensor_rerank control is not the Seed reranker.
Regions
Not collected
API endpoint URL
POST /api/vikingdb/data/search/multi_modalSource for API endpoint URL (opens in a new tab)
API model selector
rerank.model_name=doubao-seed-rerank; model_version=251028. Example usage label: Skylark-seed-rerank__251028.Source for API model selector (opens in a new tab)
Ranking controls
input_limit must be at least search.limit and at most 100; optional instruction, score_threshold and timeout_ms.Source for Ranking controls (opens in a new tab)
Output formats
Search results include reranked score, original ann_score and per-model token usage.Source for Output formats (opens in a new tab)
Generation mode
On failure, fallback returns original retrieval order with rerank_error; fail_fast rejects the request.Source for Generation mode (opens in a new tab)

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Volcengine VikingDB via OpenViking

Provider source (opens in a new tab)
API model ID
doubao-seed-rerank
Access
Optional client integration. The open-source client does not distribute the served reranker weights.
Regions
cn-beijing (documented host)
API model selector
provider=vikingdb; model_name=doubao-seed-rerank; model_version=251028Source for API model selector (opens in a new tab)
SDK support
OpenViking official integration; AK/SK authentication, host api-vikingdb.vikingdb.cn-beijing.volces.com.Source for SDK support (opens in a new tab)
Ranking controls
Client threshold defaults to 0.1. Client max_input_tokens=0 disables truncation; positive settings must be at least 128.Source for Ranking controls (opens in a new tab)

Client estimated query/document truncation, not proof of the model context limit.

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

Volcengine VikingDB Knowledge Base

doubao-seed-rerank
Not verified

No model-specific prompt-cache contract or cached-input rate established.

How it works
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or cached-input rate established.

How to enable it
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Usage fields
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Billing rules
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or cached-input rate established.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 15 Oct 2026

BytePlus VikingDB integrated search

doubao-seed-rerank
Not verified

No model-specific prompt-cache contract or cached-input rate established.

How it works
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or cached-input rate established.

How to enable it
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Usage fields
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Billing rules
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or cached-input rate established.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 15 Oct 2026

Volcengine VikingDB via OpenViking

doubao-seed-rerank
Not verified

No model-specific prompt-cache contract or cached-input rate established.

How it works
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or cached-input rate established.

How to enable it
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Usage fields
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Billing rules
Not collected

No model-specific prompt-cache contract or cached-input rate established.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or cached-input rate established.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 15 Oct 2026

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Official documentation explicitly identifies this as a ByteDance-developed model, served by managed APIs. Reviewed ByteDance and Seed public inventories contain no matching foundation checkpoint. Closed-weight status is inferred; no explicit weight-license declaration was found.

Classification evidence (opens in a new tab)

Sources reviewed