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The Major Agent Frameworks — An Honest Comparison

Compare OpenAI Agents SDK, Anthropic Claude Code, CrewAI, and LangChain — what each does well and where each falls short.

16 min readagent-frameworks, openai, anthropic, crewai, langchain, comparison

The AI agent framework space moves fast — new tools launch weekly, existing ones pivot, and the "best" option changes with every major model release. Rather than chasing the latest hype, this lesson gives you a framework for evaluating these tools and an honest snapshot of where the major players stand.

You wouldn't pick a programming language without understanding the tradeoffs. Don't pick an agent framework that way either.

What Makes an Agent Framework?

Before comparing specific tools, let's define what we're comparing. An agent framework provides some combination of:

  • Conversation management — Maintaining context across multiple interactions
  • Tool use — Letting the AI call functions, read files, make API calls
  • Orchestration — Coordinating multiple agents or mult

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