GPT-4 Chat: AI Writer is a free Chrome extension that aims to assist individuals who struggle with writing in English or any other language. This tool offers a range of features to improve the quality of written communication, including grammar correction, message rewriting, and reply suggestions. It integrates ChatGPT into various messaging platforms, allowing users to utilize their chat history and text input to craft messages more effectively. With just one click, users can correct grammar, rewrite selected text in different styles, and receive suggestions for messages in various tones. Custom actions can also be created for quick access, such as text translation or summarization. Please note that GPT-4 features are exclusively available for ChatGPT Plus Subscription users, while free plan users have access to GPT-3.5.