OpenRouter
One Unified API for Hundreds of AI Models
by OpenRouter, Inc. · New York, NY, USA · Founded 2023
What is OpenRouter?
OpenRouter is an AI infrastructure platform that provides a single, OpenAI-compatible API endpoint to access over 400 large language models from 60+ providers, including OpenAI, Anthropic, Google, and Meta.
It acts as both a marketplace and intelligent routing layer, automatically directing prompts to the best-fit model based on cost, speed, and privacy requirements. The platform supports pay-as-you-go credits with zero markup on provider pricing and charges a flat 5.5% platform fee.
OpenRouter includes built-in fallback routing, prompt caching, guardrails, zero data retention options, and Bring-Your-Own-Key support, making it a popular gateway for over one million developers worldwide.
OpenRouter — One Unified API for Hundreds of AI Models Whether you're evaluating OpenRouter for your team or comparing it to alternatives in the AI Productivity Tools category, this in-depth review covers everything: features, pricing, real user reviews, pros and cons, integrations, and direct comparisons against competitors.
OpenRouter Demo Video
Key Features 8
Who Is OpenRouter For
Pros & Cons
- Zero Markup Provider Pricing
- 400+ Models Single Endpoint
- OpenAI-Compatible Drop-In Replacement
- Built-In Fallback and Routing
- Free Tier Rate Limits
- Customer Support Response Times
- No Native Frontend Interface
Frequently Asked Questions
5 questionsOpenRouter uses an intelligent routing layer that directs each API request to the most suitable model and provider based on parameters like cost, latency, and availability. It supports auto-routing, manual model pinning, and fallback chains that retry with alternative providers if the primary one fails.
Yes. OpenRouter exposes an OpenAI-compatible API endpoint. Developers can point the standard OpenAI SDK at OpenRouter by changing the base URL and API key, requiring minimal code changes to access hundreds of models from different providers.
BYOK allows developers to use their own API keys from providers like OpenAI or Anthropic while still benefiting from OpenRouter's routing, fallback, and logging features. Pay-as-you-go users get 1 million free BYOK requests per month, with a 5% fee after that.
OpenRouter does not store prompts or responses by default. Users can enable optional input/output logging for debugging. Zero Data Retention toggles are available per provider, and anonymous prompt categorization never links to user accounts.
The Agent SDK (@openrouter/agent) provides higher-level primitives for building AI agents. It handles multi-turn conversation loops, tool execution with human-in-the-loop support, and state management automatically through a single callModel function.
Who is OpenRouter for?
OpenRouter is most useful for AI Application Developers, Full-Stack Engineers Building LLM-Powered Products, DevOps Teams Managing Multi-Model Infrastructure and AI Startup Founders Prototyping MVPs.
OpenRouter pricing
OpenRouter uses a freemium model: a usable free tier with optional paid upgrades. Headline pricing: Pay-per-use. For the current tier breakdown and any limits, see the pricing section above or check the vendor's pricing page directly — limits and prices change.
What's New
Launched private models beta for routing to custom fine-tuned endpoints, added BYOK key prioritization with drag-and-drop ordering, and introduced adaptive Exa highlights for web search.
Rebuilt personal profile pages with refreshed activity charts, added session-ID-based provider stickiness for better cache hit rates in agentic workflows, and introduced human-in-the-loop tool calling support.
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OpenRouter Pricing
Pay-per-use
- 25+ free models
- 4 free providers
- Chat and API access
- 50 requests per day rate limit
- 400+ models from 60+ providers
- No markup on provider pricing
- No minimum spend or lock-in
- Prompt caching and auto-routing
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