refactor: use Field for default list and dict in Pydantic models

[bigint]

Imported Field from Pydantic and replaced mutable default containers with default_factory to ensure each model instance gets its own list or dictionary

[Sahil3378]

import json

Your JSON data (as a string for example purposes)

data = """
{
"id": "response_id",
"object": "response",
"created_at": 1751884892,
"status": "completed",
"model": "gpt-oss-120b",
"output": [
{
"id": "msg_id",
"type": "message",
"status": "completed",
"role": "assistant",
"content": [
{
"type": "output_text",
"text": "Hello! How can I help you today?",
"annotations": []
}
],
"parallel_tool_calls": true,
"reasoning": {
"effort": "medium",
"summary": null
}
}
],
"temperature": 1,
"usage": {
"input_tokens": 294,
"output_tokens": 2520,
"total_tokens": 2814
}
}
"""

Parse JSON string into Python dictionary

parsed = json.loads(data)

Extract text from the first output's content