GPTweet is a free Chrome extension that leverages ChatGPT to assist you in composing Twitter replies. It utilizes the powerful ChatGPT AI to generate high-quality responses without the need for login or registration. You can use your own OpenAI API Key, which is stored locally on your computer and never saved on any servers. Please note that GPTweet currently only supports replying to single tweets and does not yet understand tweet threads or media content. It is intended to provide you with a first draft for your Twitter replies, and users are recommended to proofread and edit before sending.