Aug 11, 2026
Choosing an Agent Framework in 2026: LangGraph vs LlamaIndex vs CrewAI vs AutoGen (and the Vendor SDKs)
Six agent framework milestones shipped in the same week of August 2026. Here is a side-by-side decision guide for picking between the four open-source frameworks (LangGraph, LlamaIndex, CrewAI, AutoGen) and the two vendor SDKs (OpenAI Agents SDK, Anthropic Agent SDK), based on your mental model and workflow shape.