A side-by-side of two agent frameworks for building AI agents — live GitHub data, languages, and what each is best at.
| Pydantic AI | Claude Agent SDK | |
|---|---|---|
| GitHub stars | ★ 18k | ★ 7.5k |
| Language | Python | Python |
| Category | Agent frameworks | Agent frameworks |
| Best for | type-safe agents | Claude-native agents |
| Repository | pydantic/pydantic-ai | anthropics/claude-agent-sdk-python |
Pydantic AI and Claude Agent SDK are both credible choices. By community traction, Pydantic AI leads (★ 18k). Pick Pydantic AI for type-safe agents; pick Claude Agent SDK for Claude-native agents.
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