W&B Inference でサーバー エラー（500、503）を解消するにはどうすればよいですか？

import time
import openai

def call_with_retry(client, messages, model, max_retries=5):
    for attempt in range(max_retries):
        try:
            return client.chat.completions.create(
                model=model,
                messages=messages
            )
        except Exception as e:
            if "500" in str(e) or "503" in str(e):
                if attempt < max_retries - 1:
                    wait_time = min(60, (2 ** attempt))
                    time.sleep(wait_time)
                else:
                    raise
            else:
                raise