AutoGPT

AutoGPT is the most recognized autonomous AI Agent">AI agent platform, leveraging large language models to achieve user-defined goals without constant human supervision. Created by game developer Toran Bruce Richards and released in March 2023, AutoGPT quickly became one of the most starred projects on GitHub with over 170,000 stars, establishing itself as the foundational project in the autonomous AI agent space. The 2026 version has evolved far beyond its original CLI experiment to include a visual Agent Builder for low-code workflow creation, a persistent AutoGPT Server for continuous cloud-based deployment, and a robust plugin system for extensibility. Give AutoGPT a goal, and it will autonomously plan, execute, evaluate, and iterate on tasks, calling tools, writing code, browsing the web, and managing its own memory throughout the process. The platform supports multiple agents running in parallel for different projects, with specific constraints ensuring reliable and predictable execution. Developers can expand functionality through plugins, tool integrations, and connections to frameworks like LangChain and RAG)">Retrieval-Augmented Generation systems. The 2026 version includes improved memory management, support for multiple LLM backends including GPT-4, Claude, and open-source models, and a modular skill system that enables agents to learn and reuse capabilities across tasks. As an open-source project, AutoGPT is free to download and use with no licensing fees. Users pay only for the underlying LLM API calls they consume, with typical costs ranging from 0.50 to 5 dollars per complex task depending on the model chosen and iteration depth. Cloud hosting is optional for persistent agent deployment.