CoAI.Dev is an enterprise-grade AI gateway that consolidates access to multiple LLM providers (OpenAI, Anthropic, Gemini, Midjourney, etc.) behind a single API endpoint. It features priority-based load balancing and routing, credit and subscription billing systems, multi-tenant architecture with admin controls, file parsing, web search integration, and model caching. The platform provides a web UI compatible across devices with markdown rendering, theming, and internationalization support.