Claude — API Quick Start

API Quick Start
# Install the SDK
pip install anthropic

# Basic message (Python)
import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Explain neural networks in 3 sentences."}
    ]
)

print(message.content[0].text)

# With system prompt
message = client.messages.create(
    model="claude-opus-4-6",
    max_tokens=2048,
    system="You are an expert software architect.",
    messages=[
        {"role": "user", "content": "Design a microservices architecture for a food delivery app."}
    ]
)
      