A agentindex
Comparison

LangGraph vs Pydantic AI

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

LangGraph

Graph-based agent orchestration from LangChain.

  • + Explicit state graph suits complex workflows
  • + Checkpointing enables human-in-the-loop
  • − Steep learning curve
  • − Tied to the LangChain ecosystem

Pydantic AI

Type-safe agent framework from the Pydantic team.

  • + Type-safe structured outputs
  • + Clean dependency-injection design
  • − Newer, fewer integrations than LangChain
  • − Python only
Spec LangGraph Pydantic AI
Category framework framework
License MIT MIT
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing free free
Starting price BYOK usage cost BYOK usage cost
Models claude, gpt, gemini, byok claude, gpt, gemini, byok
Languages python, typescript python
GitHub stars 35.7k 18.0k
Last activity 2026-06-25 2026-06-25