LangChain Deep Agents
Library for long-running agents with subagents and skills; 0.7.23 (Oct 7) adds pinned_skills.
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About LangChain Deep Agents
LangChain Deep Agents is listed in our frameworks category and is aimed at builders. Library for long-running agents with subagents and skills; 0.7.23 (Oct 7) adds pinned_skills. Pricing, as the maker states it: Open source. Maturity: Active. We last checked the official link on 2026-10-14.
What is LangChain Deep Agents?
Deep Agents is LangChain's open-source agent harness: an opinionated agent that runs out of the box, with defaults tuned for long-horizon, multi-step work. You can extend, override or replace any piece without forking.
It works with any LLM that supports tool calling, is built on LangGraph for streaming, persistence and checkpointing, and has tracing, evaluation and deployment through LangSmith. Sub-agents with isolated context windows and a pluggable filesystem are built in.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: docs.langchain.com/deepagents.
Who is LangChain Deep Agents for?
Developers who want a ready-made harness for long-running agents with sub-agents, while keeping the option to customize everything.
LangChain Deep Agents at a glance
- Open source: Yes (MIT License)
- GitHub: langchain-ai/deepagents · 30,474 stars (as of Oct 21, 2026)
Key features
- Opinionated defaults for long tasks
- Sub-agents with isolated context
- Pluggable filesystem
- Model-agnostic
- Built on LangGraph; LangSmith integration
LangChain Deep Agents FAQ
What is LangChain Deep Agents?
Deep Agents is LangChain's open-source agent harness: an opinionated agent that runs out of the box, with defaults tuned for long-horizon, multi-step work. You can extend, override or replace any piece without forking.
Who is LangChain Deep Agents for?
Developers who want a ready-made harness for long-running agents with sub-agents, while keeping the option to customize everything.
Is LangChain Deep Agents free?
LangChain Deep Agents's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is LangChain Deep Agents open source?
Yes. LangChain Deep Agents is released under the MIT License, according to its GitHub repository.
What are alternatives to LangChain Deep Agents?
Similar tools include Ruflo, smolagents, Marvin, MS-Agent, Agent Lightning and Agentic Context Engine.
LangChain Deep Agents ratings and reviews
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