AutoGPT is one of the first and most popular autonomous AI agent projects. It chains together LLM calls to autonomously achieve goals you set, breaking them down into sub-tasks and executing them.
OpenAI's official SDK for building multi-agent workflows
Agent Frameworks
The OpenAI Agents SDK provides primitives for building agentic AI applications: agents with instructions and tools, handoffs between agents, guardrails for input/output validation, and tracing for debugging.