A software component that plans, calls tools, observes outcomes, and continues acting toward a goal, using an LLM as its reasoning engine.
agents
AI Agent
Related terms
Tools that implement AI Agent
LangChain
RAG · BYO (any major LLM)
8.3
The broad LLM application framework — chains, agents, retrievers.
Freemium· Free open-source; LangSmith paidgeneral LLM appsRAG
LangGraph
FeaturedAgents · BYO (Claude / GPT / open)
8.8
Stateful, graph-based agent orchestration from LangChain.
Freemium· Free open-source; LangGraph Platform paidstateful agentshuman-in-loop
CrewAI
FeaturedAgents · BYO (Claude / GPT / open)
8.4
Python framework for multi-agent orchestration.
Freemium· Free open-source core; cloud platform paidmulti-agentorchestration
Claude Agent SDK
Agents · Claude Opus / Sonnet
8.6
Anthropic's official SDK for building autonomous Claude agents.
Free· Free SDK; API usage billed at Claude ratesClaude agentstool use
OpenHands
Agents · Multi-model (Claude, Gemini, GPT/Codex)
8.0
Open-source autonomous coding agent that plans, edits, and ships changes across real codebases.
Freemium· Free OSS tier; paid Team plan; Enterprise quoteautonomous-codingpr-review