How do you call the claude-sonnet-5 API?

How do you call the claude-sonnet-5 API?

If you already use the official OpenAI SDK, swap base_url and api_key — every other line stays as it is.

1. Confirm the model and group：Confirm in the dashboard that claude-sonnet-5 is available, then check the group assigned to the current account and its corresponding multiplier.
2. Create and secure access credentials：Create access credentials according to the platform's page instructions. Inject them through environment variables or a secrets management service; do not write them into the code repository.
3. Prepare the complete request URL：Obtain the complete API request URL from the platform documentation or console, and write it to the API_URL environment variable.
4. Make a test request using the model ID：Pass model=claude-sonnet-5 in the request body and first use a minimal, non-sensitive input to validate the response format.
5. Verify billing and actual behavior：Reconcile the billing result based on input, output, cache hits, and the account group. Also record latency, error codes, and rate-limiting behavior.

Complete code example

import json
import os
from urllib import request

api_url = os.environ["API_URL"]
api_key = os.environ["API_KEY"]

payload = {
    "model": "claude-sonnet-5",
    "messages": [
        {"role": "user", "content": "请用一句话说明这个请求是否已收到。"}
    ]
}

req = request.Request(
    api_url,
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Content-Type": "application/json",
        "Authorization": f"Bearer {api_key}"
    },
    method="POST"
)

with request.urlopen(req, timeout=60) as response:
    print(response.read().decode("utf-8"))

https://api.openlux.ai

More on this site

• claude-sonnet-5: direct API or gateway?Point-by-point, including the limitations
• claude-sonnet-5 API — frequently asked questionsWhat people actually ask when integrating

Get started

First confirm the claude-sonnet-5 group and credentials in the dashboard, then complete integration validation with a minimal request

Create an account and generate a key

Official site: OpenLux Claude Sonnet 5 API proxy