# Aigap AI Router > Aigap AI Router is a multi-model LLM routing platform. Call one OpenAI-compatible API; Aigap routes each request to the best provider (Anthropic, OpenAI, Google, Mistral, xAI) by cost, speed and quality, with failover, guardrails, live provider health and prepaid USD credits. ## Product - [Home](https://ai-router.aigap.com/): One API, every model — smart routing, failover, guardrails. - [Pricing](https://ai-router.aigap.com/pricing): Free Starter plan + prepaid credits from $5. 1 credit = $1 of routed usage. - [Blog](https://ai-router.aigap.com/blog): Guides on LLM routing, cost optimization and reliability. - [Sign up](https://ai-router.aigap.com/register): Create a workspace and get an API key in minutes. ## Key concepts - Smart routing: score models on cost/speed/quality per request against a policy. - Autopilot: continuously re-optimize routing toward a goal (min cost, cap latency, quality floor, keep sensitive data local). - Failover: automatic retry to the next-healthiest provider on slowness or error. - Guardrails: PII redaction, profanity filtering, outbound-data protection, local models for data residency. - Credits: prepaid USD wallet; per-request token cost + transparent margin; unused credit rolls over. ## Blog - [Reliability by design: failover and live provider health](https://ai-router.aigap.com/blog/failover-and-provider-health): Providers have outages. A router with live health monitoring and automatic failover keeps your product up when they go down. - [How to cut LLM costs 40% without losing quality](https://ai-router.aigap.com/blog/cut-llm-costs-without-losing-quality): Model prices vary 15x for similar quality on many tasks. Smart routing captures that gap automatically. A practical guide. - [What is an AI router, and why your LLM stack needs one](https://ai-router.aigap.com/blog/what-is-an-ai-router): An AI router sends each prompt to the best model by cost, speed and quality — cutting spend without sacrificing output. Here is how it works.