Agent framework comparisons rot at the model line, not the framework line

Framework comparisons — CrewAI vs LangGraph vs AutoGPT — age in a lopsided way. The architectural analysis stays valid for years: LangGraph is a state machine, CrewAI is role delegation, AutoGPT is autonomous looping. That part of any 2024 article still holds.

The code samples are what rot. Nearly every comparison pins its examples to a specific hosted model — and those go away. The classic llama-3.3-70b-versatile on Groq that half these tutorials use is now Enterprise-only, so the "working example" in the article fails before you've evaluated any framework at all.

Which framework fits which problem shape, with examples on models that exist: https://toolfreebie.com/crewai-vs-autogpt-vs-langgraph/