ChaptersAI is a chat client based on OpenAI's GPT model that offers unlimited branching, helping users build complex projects and easily navigate back to the original chat context. Suitable for writing, development, and more, users can create an unlimited number of projects with branching and version management capabilities. Project data is entirely stored in the user's browser, ensuring privacy and security. ChaptersAI is priced at $9 per month, plus OpenAI API usage fees.