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Everything you need to integrate Claude into your applications. From first API call to production.
import anthropic
client = anthropic.Anthropic()
message = client.messages.create(
model="claude-sonnet-4-6",
max_tokens=1024,
messages=[{
"role": "user",
"content": "Hello, Claude"
}]
)
print(message.content[0].text)Pick the developer surface that matches your approach, and the infrastructure that fits your stack.
Send a request, get a response. You construct every turn, manage conversation state, and write your own tool loop.
Claude Code as a library. Give Claude a task and the SDK runs the loop with built-in file, shell, and web tools.
Follow the lifecycle or jump to what you need.
Choose the right model for your use case.