Multi-model orchestration is three layers. Workflow orchestration is planning, state, memory, and delegation, and LangGraph and CrewAI are built for it. Model routing is choosing a model per call and falling back when it fails, and provider routing is choosing which provider serves that model.
LangChain vs CrewAI: Orchestration Compared to OpenRouter-Native Routing
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October 2, 2026
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openrouter