Pika, powered by GPT4, allows users to create chatbots that learn from their own content, including PDFs and URLs. The chatbots can be customized with a profile picture, greeting message, and response length, and can be embedded on unlimited websites. Pika supports file types such as PDF, CSV, TXT, and DOCX, and offers flexible pricing plans with analytics and support included. Pika has been used by over 2,000 users and is compatible with popular websites, providing a powerful solution for creating AI chatbots using personalized content.