（a）
curl https://api.anthropic.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: ${ANTHROPIC_API_KEY}" \
  -d '{
    "model": "claude-3-haiku",
    "max_tokens": 100,
    "messages": [
      {"role": "user", "content": "富士山の高さは？"}
    ]
  }'


(b)

{
  "id": "msg_01A2B3C4D5E6F7G8H9I0J1K2",
  "type": "message",
  "role": "assistant",
  "model": "claude-3-haiku-20240307",
  "content": [
    {
      "type": "text",
      "text": "富士山の高さは3,776メートル（3,776m）です。これは日本最高峰の標高で、静岡県と山梨県にまたがる活火山です。"
    }
  ],
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {
    "input_tokens": 12,
    "output_tokens": 45
  }
}
