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anthropic/claude-opus-5.5

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Reliable AI models via our distributed infrastructure. Fall back to other providers when one goes down.

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Keep costs in check without sacrificing speed. OpenRouter runs at the edge for minimal latency between your users and their inference.

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Protect your organization with fine grained data policies. Ensure prompts only go to the models and providers you trust.

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Replit

The easiest way to go from idea to app

Hermes Agent

An autonomous agent that grows with you

Cline

The open-source AI coding agent

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Recent Blog Posts

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Model Routing for Support Bots: Cheap-First FAQ Handling

Cheap-first routing sends routine support questions to a small, inexpensive model and escalates selected hard or uncertain requests to a stronger one. This guide compares the three application-side routing patterns, separates what your application owns from what OpenRouter's Auto Router and model fallbacks handle, walks through a support flow with a copyable request, and sets out how to measure escalation rate and cost per resolved ticket.

October 2, 2026

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 does the second two. This article separates the layers, shows the same two-step pipeline in direct OpenRouter calls and in LangChain, and describes when to add a framework, when to use our Agent SDK, and how to put OpenRouter underneath LangGraph or CrewAI.

October 2, 2026

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. Some translate one definition into each provider's format, some are native to a single provider, and some hand the question to a connector underneath. This article compares six frameworks on schema definition, translation, and MCP support, then shows how OpenRouter normalizes tool calling at the API layer so a model swap is a change to one string.

October 2, 2026