Text generation + reasoning - stream

{
    "contents": [
        {
            "parts": [
                {
                    "text": "1+2+3+4+5+....+999?"
                }
            ],
            "role": "user"
        }
    ],
    "systemInstruction": {
        "parts": [
            {
                "text": "hi"
            }
        ],
        "role": "user"
    },
    "safetySettings": [
        {
            "category": "HARM_CATEGORY_HATE_SPEECH",
            "threshold": "OFF"
        },
        {
            "category": "HARM_CATEGORY_SEXUALLY_EXPLICIT",
            "threshold": "OFF"
        },
        {
            "category": "HARM_CATEGORY_HARASSMENT",
            "threshold": "OFF"
        },
        {
            "category": "HARM_CATEGORY_DANGEROUS_CONTENT",
            "threshold": "OFF"
        },
        {
            "category": "HARM_CATEGORY_CIVIC_INTEGRITY",
            "threshold": "BLOCK_NONE"
        }
    ],
    "tools": [],
    "generationConfig": {
        "temperature": 1,
        "topP": 1,
        "thinkingConfig": {
            "includeThoughts": true,
            "thinkingBudget": 26240
        }
    }
}