LangGraph
From LangChain
A library for building agents as explicit graphs, not a consumer app. The right pick for engineers shipping agents in their own product.
- Best for
- Engineers who need a durable agent loop inside a product they own.
- Pricing hint
- Open-source library. You pay for the models, and optionally for LangSmith.
LangGraph is not a chatbot you log into. It is how a team draws the steps, the tools, and the stops. Skip it if you just want Claude or ChatGPT today. Use it if the agent is the product.
Where it fits
- The control flow is visible, which matters when an agent can take actions.
- Open source, so you are not renting the loop.
Where it does not
- You write software. There is no friendly app.
- Frameworks in this space move; pin versions.
Tags: Agents · Open source · API
Also filed under Agents
Note updated October 15, 2026
Others in Agents
- ChatGPT — The default general assistant. Broad enough for everyday writing and light tool use, and less predictable than Claude when a long edit has to stay careful.
- Claude — The best default for long documents and careful agent-style work. Easier to steer than most chats, and less of a do-everything platform than ChatGPT.
- Devin Oncall — An on-call agent that starts the moment an alert fires, digs through telemetry and code, and hands you a fix as a pull request.
- Gemini — Worth opening when the work already lives in Google, or when you want image generation in the same chat. Not the first pick for code or a long edit.