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ChatGPTをPythonから呼び出す

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PythonからChatGPTを含むOpenAIの各種モデルのAPIを叩く方法。

APIは課金用の請求先を登録する必要がある. APIは月額課金ではなく従量課金になっており、gpt-4で750 word=0.03USD と普通に使う分にはそこまで高くない。
https://openai.com/pricing

  1. Set up paid accountから請求先のクレジットカード情報を登録する。
    https://platform.openai.com/account/billing/overview

  2. APIキーを作成する。
    https://platform.openai.com/account/api-keys

  3. ライブラリをインストールする。
    pip install openai

  4. 以下を実行する。

import openai

openai.api_key = "<YOUR API KEY>"

response = openai.ChatCompletion.create(
    model="gpt-3.5-turbo",
    # model="gpt-4",
    messages=[
        {"role": "user", "content": "How to use chatgpt?"},
    ],
)
print(response.choices[0]["message"]["content"].strip())

使用できるモデルの一覧

openai.Model.list()

APIリファレンス
https://platform.openai.com/docs/api-reference

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