Pydantic-Ai

We’ve covered the “big three” AI agent frameworks — LangGraph, CrewAI, and Pydantic AI — in our 2026 framework decision guide. That guide remains the place to go for deep dives on those three. But the landscape has shifted. GitHub repositories for AI agent frameworks grew 535% between 2024 and 2025. Four more frameworks now have production deployments and genuine trade-offs worth understanding: the OpenAI Agents SDK, Claude SDK (Anthropic), Google ADK, and Dify. ...

The AI agent framework landscape looked very different eighteen months ago. In mid-2024, there were somewhere north of 14 actively-maintained frameworks competing for developer attention — AutoGen, MetaGPT, SuperAGI, AgentVerse, and a long tail of others all vying for the same mindshare. By early 2026, the field has consolidated dramatically. Three frameworks have emerged as the clear dominant players: LangGraph, CrewAI, and Pydantic AI. This isn’t a comprehensive benchmark — it’s a practical decision guide. Here’s how to choose. ...