Anthropic

“Get API key” opens Anthropic’s console where you can sign in, claim free credits, and generate your key. “Documentation” shows how to set it up and call the API.

Claude model family. Best-in-class reasoning and 200k token context window.

import anthropic

client = anthropic.Anthropic(api_key="YOUR_KEY")
msg = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}]
)
print(msg.content[0].text)