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+---
+aliases: ai-agents, ai-autonomous-agent
+display_name: AI Agent
+short_description: Autonomous software systems that use foundation models to reason, plan, and take actions.
+topic: ai-agent
+related: agent-harness, llm, chatbot, machine-learning, mcp
+---
+
+An **AI agent** is a software system that autonomously perceives its environment, makes decisions, and takes actions to achieve goals — typically powered by large language models (LLMs). Unlike simple chatbots, AI agents can use tools, access external data, execute code, browse the web, and manage multi-step workflows without continuous human guidance.
+
+AI agents range from coding assistants that edit files and run tests (Claude Code, Gemini CLI, Cursor) to browser automation systems (browser-use), computer-use agents (CUA), workflow builders (Activepieces), and multi-agent teams (CrewAI, deer-flow). The ecosystem includes memory layers (mem0), frontend toolkits (CopilotKit), sandboxed execution environments (E2B, Daytona), and full productivity platforms (Cherry Studio, LobeHub).