인증 경로: API 키 · 콘솔 · OAuth · Bedrock/Vertex

import os
from anthropic import Anthropic

# 키는 env에서, 절대 하드코딩 X.
client = Anthropic(api_key=os.environ["ANTHROPIC_API_KEY"])

response = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=512,
    messages=[{"role": "user", "content": "One sentence on why pinning model ids matters."}],
)
print(response.content[0].text)

# Claude Agent SDK는 `claude` CLI 로그인 OAuth 토큰을 그대로 재사용.
# `claude login` 한 번 하면 SDK가 keychain에서 토큰을 자동으로 집어.
import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions

async def main():
    options = ClaudeAgentOptions(
        cwd="/tmp",
        # api_key 안 줌; 인증은 keychain의 OAuth 토큰으로 흐름.
    )
    async for event in query(prompt="What model are you?", options=options):
        print(event)

asyncio.run(main())

import AnthropicBedrock from '@anthropic-ai/bedrock-sdk';

// 인증은 표준 AWS credential chain (profile, env, IAM role).
const client = new AnthropicBedrock({ awsRegion: 'us-east-1' });

const message = await client.messages.create({
  model: 'anthropic.claude-sonnet-4-6-v1:0',
  max_tokens: 256,
  messages: [{ role: 'user', content: 'One-line summary of Bedrock vs direct API.' }],
});
console.log(message.content);