Saturday, December 27, 2025

Agentic AI Frameworks - Crew AI, LangChain, and LangGraph

  

LangChain- LangChain is a framework for building applications powered by LLMs (Large Language Models). It helps developers connect language models with external data sources and tools. Modular framework for building LLM apps.

Key Features:

  • Chains: Combine multiple steps (e.g., prompt → model → output) into a workflow.
  • Agents: Enable LLMs to make decisions and utilize tools dynamically (e.g., calculators, search engines).
  • Memory: Store context across interactions for more personalized responses.
  • Integrations: Connects with APIs, databases, files, and other services.

 

LangGraph -- LangGraph is built on top of LangChain and is designed for creating stateful, multi-step workflows using a graph-based architecture. Extension for building statefulmulti-step, and dynamic workflows using LangChain. LangGraph builds on LangChain by introducing graph-based workflows, which allow for non-linearstateful, and dynamic execution paths.

Key Features:

  • Graph-based execution: Nodes represent steps, and edges define transitions.
  • State management: Keeps track of the conversation or task state across steps.
  • Looping and branching: Supports complex logic like retries, conditionals, and loops.

 

LangSmith - it is a developer platform created by the makers of LangChain to help you debug, test, and monitor applications built with language models.

Key Features: LangSmith provides tools for:

  • Tracing: to see how your LLM app executes step-by-step (prompts, responses, tool calls).
  • Debugging: Identify where issues arise in complex chains or agent workflows.
  • Evaluation: Run automated or manual tests to assess quality and reliability.
  • Monitoring: Track performance and usage over time in production environments.



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