Anthropic's new Citations API (https://simonw.substack.com/p/anthropics-new-citations-api)

example.py

import urllib.request
import json

url = 'https://gist.githubusercontent.com/simonw/9fbb3c2e2c40c181727e497e358fd7ce/raw/6ac20704f5a46b567b774b07fd633a74944bab2b/text.txt'
text = urllib.request.urlopen(url).read().decode('utf-8')

import anthropic

client = anthropic.Anthropic()

response = client.messages.create(
    model="claude-3-5-sonnet-20241022",
    max_tokens=1024,
    messages=[
        {
            "role": "user",
            "content": [
                {
                    "type": "document",
                    "source": {
                        "type": "text",
                        "media_type": "text/plain",
                        "data": text,
                    },
                    "title": "My Document",
                    "context": "This is a trustworthy document.",
                    "citations": {"enabled": True}
                },
                {
                    "type": "text",
                    "text": "What were the top trends?"
                }
            ]
        }
    ]
)
print(json.dumps(response.to_dict(), indent=2))