Claude vs openai

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title: “Claude API vs OpenAI API: A comprehensive comparison” seo: “Claude API vs OpenAI API — Which is better for your project?” description: “Compare Claude and OpenAI APIs side by side — pricing, features, performance, and code examples. Find out which AI chat API fits your needs.”

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Quick comparison

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Unified API access

• One API key for all services
• OpenAI-compatible format for chat models — switch models by changing one parameter
• Pay-as-you-go pricing with free trial credits
• No separate accounts needed for each provider

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Code example

import requests

API_KEY = "YOUR_API_KEY"

def call_api(model, prompt):
    return requests.post(
        "https://api.acedata.cloud/v1/chat/completions",
        headers={"Authorization": f"Bearer {API_KEY}"},
        json={"model": model, "messages": [{"role": "user", "content": prompt}]},
    ).json()

# Switch between providers with one line change
result = call_api("claude-sonnet-4-20250514", "Hello!")
result = call_api("gpt-4o", "Hello!")
result = call_api("gemini-2.5-flash", "Hello!")

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Get started

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Try it free