Using Claude Opus 4.5 on Vercel AI Gateway

Implementation guide · Claude 4.5 · Anthropic

Serverless

Vercel AI Gateway exposes Claude Opus 4.5 through model ID anthropic/claude-opus-4.5. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-26. 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 anthropic/claude-opus-4.5 — see the documentation for request format.
3
You'll be billed $5.00/1M input, $25.00/1M output tokens. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

Install

pip install openai

API key

AI_GATEWAY_API_KEY

Model ID

anthropic/claude-opus-4.5

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="anthropic/claude-opus-4.5",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on Vercel AI Gateway

Type	Price (per 1M)
Input tokens	$5.00
Output tokens	$25.00
Query	$10.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode Execution

About Claude Opus 4.5

Claude Opus 4.5 is Anthropic's Claude 4.5 model with multimodal text and image input and an optional reasoning mode. It offers a 200K-token context window and scores 80.7 on MMMU.

Full model details →

Model Specs

Released2025-11-01

Context200k

ArchitectureDecoder Only

Knowledge cutoff2025-12

Vercel