Using Cohere Rerank 5 Fast on Vercel AI Gateway

Implementation guide · Cohere Rerank · Cohere

Serverless

Vercel AI Gateway exposes Cohere Rerank 5 Fast through model ID cohere/rerank-v5-fast. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-10-22. Next refresh: weekly.

Quick Start

1
Create an account at Vercel AI Gateway and generate an API key.
2
Use the Vercel AI Gateway SDK or REST API to call cohere/rerank-v5-fast — see the documentation for request format.
3
You'll be billed $0.02/1M input. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

Install

pip install openai

API key

AI_GATEWAY_API_KEY

Model ID

cohere/rerank-v5-fast

creator/model-name e.g. kwaipilot/kat-coder-pro-v2

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["AI_GATEWAY_API_KEY"],
    base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
    model="cohere/rerank-v5-fast",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on Vercel AI Gateway

Type	Price (per 1M)
Input tokens	$0.02

Capabilities

No model capability flags are currently sourced.

About Cohere Rerank 5 Fast

Cohere Rerank 5 Fast is Cohere's low-latency, high-throughput reranking model, released October 21, 2026 with the Rerank 5 generation. It is multilingual, reranks English and non-English documents and semi-structured JSON within a 32,768-token query-plus-document window, and adds Context Focus, which returns the most relevant passages inside each document as scored character spans, plus calibrated relevance scores. Cohere says it outperforms its previous-generation Rerank 4 Pro. The Cohere API serves it as rerank-v5.0-fast.

Full model details →

Model Specs

Released2026-10-21

Parameters500M

Context32K

Vercel