Agent frameworksOpen source
OpenAI Agents SDK
by OpenAI
OpenAI's toolkit for building agents with tools and hand-offs.
Prices and features change often — check the official site for current plans. This listing is not an endorsement.
Best for
Agents that mainly use OpenAI models.
How to choose · Agent frameworks
Start with the simplest loop you can write yourself. Adopt a framework only for a feature you need, and keep your own logic separate.
Learn to use tools like this
Similar tools
Model Context Protocol (MCP)
A shared standard for connecting AI apps to tools and data.
Agent Development Kit (ADK)
Google's open toolkit for building and running agents.
CrewAI
Build teams of AI agents with defined roles.
LangChain & LangGraph
Popular code libraries for building AI apps, including LangGraph for step-by-step agent flows.