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anthropic/claude-opus-5.5

Higher Availability

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

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Price and Performance

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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Featured Models

500+ active models on 80+ providers

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Gemini 3.1 Pro Preview

by Google

by OpenAI

by Anthropic

Featured Agents

250k+ apps using OpenRouter with 4.2M+ users globally

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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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ElevenLabs is now on OpenRouter

ElevenLabs is now on OpenRouter with 9 Text to Speech and 2 Speech to Text models. Deliver speech with human-like emotion with Eleven v4, give your agent low-latency replies with v4 Turbo, and turn meetings into notes that show who said what with Scribe v2. Here's which model to pick, and one project built start to finish.

October 7, 2026

Server-Side Code Execution Tools for AI Agents, Compared

A server-side code execution tool runs the model's commands in the provider's sandbox during your API request, so you don't provision or secure a container. OpenAI, Anthropic, and Google run code for their own models. Our openrouter:shell tool runs commands for any model on the Responses and Messages APIs, and our openrouter:bash tool does the same on the Messages API. This article compares the four on runtime, isolation, persistence, and cost, shows a complete request against our sandbox with the output it returned, and describes the jobs that still need a sandbox platform of your own.

October 5, 2026

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