Rerank 4 Fast is Cohere's reranking model with a 33K context window and up to 33K output tokens, available from 2 providers. Cohere's fourth-generation fast reranking model optimized for low-latency document sorting by semantic similarity to a query.
Specifications
Canonical IDcohere-rerank-4-fast
TypeReranking
StatusActive
CreatorCohereCohere
Providers
Context Window33K tokens
Max Output33K tokens
Input ModalitiesText
Release Date · 11 months ago
Deprecation Date

Capabilities

Input1/5
Text✓
Image·
Audio·
Video·
PDF·
Output0/5
Text·
Image·
Audio·
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Query
$ / query
Azure AI Foundry logo
Azure AI Foundry
cohere:rerankv4fast
$0.0020
Cohere logo
Cohere
rerank-v4.0-fast
$0.0020

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Rerank 4 Fast33K——Current
Semantic Ranker 4 Fast————Available

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
Rerank 5 Fast—33K$0.020—
Rerank 5 ProPro33K$0.050—
Rerank 4 ProPro33K——
Semantic Ranker 4 Default—————
Voyage Rerank 3—32K$0.050—
Voyage Rerank 3 Lite—32K$0.020—
Rerank 3.5—4K——
Voyage Rerank 3.5—32K——
NV RerankQA Mistral 3 4B—————
Rerank 3 English——4K——

Model IDs

azure_ai/cohere-rerank-v4.0-fast
cohere-rerank-4-fast
cohere-rerank-v4-0-fast
cohere/rerank-v4-fast
rerank-v4.0-fast