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Models Model details

Cohere

Cohere: Rerank 4 Fast

cohere/rerank-4-fast

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Cohere's AI search foundation model for enhancing the relevance of information surfaced within search and RAG systems. Features a 32K context window, multilingual support across 100+ languages, no data pre-processing required, and high performance with lowest latency.

Input
$0

/ 1M tokens · Token reference

Output
$0

/ 1M tokens · Token reference

Context window
32.77K

tokens

Rerank output · Token reference fields do not establish an output-unit price.

Limits

Context

32,768

tokens

Max output

29,491

90% of the context window

Model facts

Author

Cohere

Tokenizer

Cohere

Modality

Text -> Rerank

Created

Apr 6, 2026

Publication status

Hugging Face: not mappedLicense: not publishedParameter count: not published

Modalities

Input · TextOutput · Rerank