Get started with Claude

export ANTHROPIC_API_KEY="your-api-key-here"

mkdir claude-quickstart && cd claude-quickstart
python3 -m venv .venv && source .venv/bin/activate
pip install anthropic

import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="claude-opus-5",
    max_tokens=1000,
    messages=[
        {
            "role": "user",
            "content": "What should I search for to find the latest developments in renewable energy?",
        }
    ],
)

for block in message.content:
    if block.type == "text":
        print(block.text)

python quickstart.py