OpenAI 相容模式：推理模型輸出

{
  "choices": [{
    "message": {
      "role": "assistant",
      "content": "1+1等於2。",
      "reasoning_content": "使用者在問 1+1 ……（一段思考過程）"
    },
    "finish_reason": "stop"
  }]
}

msg = resp.choices[0].message
print("正文：", msg.content)
# 思考過程（僅部分模型有，SDK 裡可能在 model_extra 中）
print("思考：", getattr(msg, "reasoning_content", None))

for chunk in stream:
    if not chunk.choices:
        continue
    delta = chunk.choices[0].delta
    reasoning = getattr(delta, "reasoning_content", None)
    if reasoning:
        render_thinking(reasoning)   # 摺疊區/灰字
    if delta.content:
        render_answer(delta.content) # 正文區

messages = [
    {"role": "user", "content": "記住數字 42。"},
    {"role": "assistant", "content": "好的，我記住了 42。"},  # 只回傳 content
    {"role": "user", "content": "剛才那個數字乘以2是多少？"}
]
# grok-4.3 / gemini-3.1-flash-lite 均正確回答 84

# 1) json_schema：嚴格按 schema 約束欄位（OpenAI 標準）
response_format = {
    "type": "json_schema",
    "json_schema": {
        "name": "city_info",
        "strict": True,
        "schema": {
            "type": "object",
            "properties": {
                "city": {"type": "string"},
                "population": {"type": "integer"},
                "is_capital": {"type": "boolean"}
            },
            "required": ["city", "population", "is_capital"],
            "additionalProperties": False
        }
    }
}

# 2) json_object：只保證是合法 JSON，不約束欄位
response_format = {"type": "json_object"}

import json, re

def parse_json_loose(content: str):
    # 去掉 <think>…</think> 字首（gpt-5.4-mini）
    content = re.sub(r"<think>.*?</think>", "", content, flags=re.S).strip()
    # 去掉 ```json 程式碼塊圍欄
    content = re.sub(r"^```(json)?|```$", "", content, flags=re.M).strip()
    try:
        return json.loads(content)
    except json.JSONDecodeError:
        return None   # 降級：記錄原文 / 重試 / 換模型