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Pyyan / Compare / Pydantic AI vs DSPy vs CrewAI vs Claude Agent SDK

Pydantic AI vs DSPy vs CrewAI vs Claude Agent SDK

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Agent Frameworks · verified 13 Aug 2026

×Pydantic AIPydanticcurrent
×SDSPyStanford NLPcurrent
×CrewAICrewAIcurrent
×Claude Agent SDKAnthropiccurrent
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SpecificationPydantic AIDSPyCrewAIClaude Agent SDK
SummaryType-safe, schema-validated agents.Compiles prompts instead of hand-writing them.Role-based agent crews.The Claude Code loop as a library.
ModelTypedCompilerRole-basedHarness
LanguagePythonPythonPythonPython, TS
MCP support——YesYes
StatusActiveActiveActiveActive
CategoryAgent FrameworksAgent FrameworksAgent FrameworksAgent Frameworks
OfficialPydantic ↗Stanford NLP ↗CrewAI ↗Anthropic ↗

Highlighted rows are where these differ.

Pydantic AI

Type-safe, schema-validated agents.

Best for predictable output.

Full spec sheet →

DSPy

  • ~23k stars
  • Built-in ReAct and agent loops

Best for optimisation.

Full spec sheet →

CrewAI

  • Define a crew with goals and tools
  • Added A2A support

Best for prototyping.

Full spec sheet →

Claude Agent SDK

  • Renamed from Claude Code SDK in March 2026
  • Tools, bash and a full agentic loop

Best for custom agents.

Full spec sheet →