Agent Frameworks Compared: Tool-Calling Schema Handling
OpenAI, Anthropic, and Google each use a different request and response shape for the same tool. Agent frameworks handle that difference in different places.
OpenRouter Blog15 min read
Model Context Protocol
3 stories
LangChain vs CrewAI: Orchestration Compared to OpenRouter-Native Routing
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.
OpenRouter Blog15 min read
Build a Reliable Tool-Calling Agent Loop on OpenRouter
A tool-calling agent loop sends the conversation and tool definitions to a model, runs the tool calls the model returns, appends the results, and repeats until the model answers or a stop condition fires.
OpenRouter Blog12 min read
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