Pyyan / Compare / Claude Agent SDK vs LangGraph vs Pydantic AI
Agent Frameworks · verified 13 Aug 2026
| Specification | Claude Agent SDK | LangGraph | Pydantic AI |
|---|---|---|---|
| Summary | The Claude Code loop as a library. | Most battle-tested for stateful production. | Type-safe, schema-validated agents. |
| Model | Harness | Graph | Typed |
| Language | Python, TS | Python, JS | Python |
| MCP support | Yes | — | — |
| Status | Active | Active | Active |
| Category | Agent Frameworks | Agent Frameworks | Agent Frameworks |
| Official | Anthropic ↗ | LangChain ↗ | Pydantic ↗ |
Highlighted rows are where these differ.
Best for custom agents.
Best for production.