ChatGPT is an advanced large language model (LLM) developed by OpenAI, designed to understand and generate human-like text. At its core, it relies on a deep neural network architecture, specifically a transformer model, trained on vast datasets of text and code. This training allows it to perform a wide range of natural language tasks, from answering questions and summarizing information to generating creative content and writing code. The latest iteration, powered by models like GPT-5.6 Sol, extends its capabilities beyond simple conversation, enabling it to act as an 'agentic AI.' This means ChatGPT can now execute complex, multi-step workflows autonomously, leveraging internal tools, external plugins, and persistent memory to achieve defined objectives without continuous human intervention. It transforms from a reactive conversational partner into a proactive, intelligent agent capable of orchestrating tasks.