Active
LangChain
Libraries and hosted tools for building, evaluating, and operating AI agents.
- LangChain, LangGraph, and Deep Agents for development
- LangSmith for tracing, evaluation, and deployment
- Hosted tools are separate from library use
LangChain supplies development libraries for applications that call models and use tools. LangGraph handles stateful agent workflows, and Deep Agents builds on that stack for longer tasks. LangSmith adds tracing, evaluation, deployment, and management services.
How pricing works
The development libraries and hosted LangSmith services have separate licensing and billing. LangSmith plans include seat and usage allowances, with additional compute and storage usage billed separately. Model calls and external services also add their own charges.