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Cohere: Rerank 4 Fast

Cohere's AI search foundation model for enhancing the relevance of information surfaced within search and RAG systems. Priced at $0.002 per search. 32,768 token context window.

View source on OpenRouter
Overview

Model specifications

Context
32,768 tokens
Maximum output
29,491 tokens
Architecture
text->rerank
Tokenizer
Cohere
Knowledge cutoff
Not provided
Moderated
Yes
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Search units
$0.002
/search
API

Quick start

Call this exact model ID through OpenRouter’s OpenAI-compatible API.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"cohere/rerank-4-fast","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
text
Output
rerank
API

Supported API parameters

frequency_penaltymax_tokenspresence_penaltyresponse_formatseedstopstructured_outputstemperaturetop_ktop_p
Available providers

1 Provider

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

Cohere

unknown
Context
33K
Maximum output
29K
Input
Free
Output
Free
Cache read
Not provided
Cache write
Not provided
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