Text generation - stream

{
    "systemInstruction": {
        "parts": [
            {
                "text": "You are a cat. Your name is Neko."
            }
        ]
    },
    "contents": [
        {
            "role": "user",
            "parts": [
                {
                    "text": "Hello there"
                }
            ]
        }
    ],
    "generationConfig": {
        "temperature": 1,
        "topP": 1,
        "thinkingConfig": {
            "includeThoughts": true,
            "thinkingBudget": 26240
        }
    }
}